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2022-04-24io_uring: optimise io_get_cqe()Pavel Begunkov
io_get_cqe() is expensive because of a bunch of loads, masking, etc. However, most of the time we should have enough of entries in the CQ, so we can cache two pointers representing a range of contiguous CQE memory we can use. When the range is exhausted we'll go through a slower path to set up a new range. When there are no CQEs avaliable, pointers will naturally point to the same address. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/487eeef00f3146537b3d9c1a9cef2fc0b9a86f81.1649771823.git.asml.silence@gmail.com [axboe: santinel -> sentinel] Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: optimise submission left countingPavel Begunkov
Considering all inlining io_submit_sqe() is huge and usually ends up calling some other functions. We decrement @left in io_submit_sqes() just before calling io_submit_sqe() and use it later after the call. Considering how huge io_submit_sqe() is, there is not much hope @left will be treated gracefully by compilers. Decrement it after the call, not only it's easier on register spilling and probably saves stack write/read, but also at least for x64 uses CPU flags set by the dec instead of doing (read/write and tests). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/807f9a276b54ee8ff4e42e2b78721484f1c71743.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: optimise submission loop invariantPavel Begunkov
Instead of keeping @submitted in io_submit_sqes(), which for each iteration requires comparison with the initial number of SQEs, store the number of SQEs left to submit. We'll need nr only for when we're done with SQE handling. note: if we can't allocate a req for the first SQE we always has been returning -EAGAIN to the userspace, save this behaviour by looking into the cache in a slow path. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/c3b3df9aeae4c2f7a53fd8386385742e4e261e77.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: add helper to return req to cache listPavel Begunkov
Don't hand code wq_stack_add_head() to ->free_list, which serves for recycling io_kiocb, add a helper doing it for us. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/f206f575486a8dd3d52f074ab37ed146b2d215b7.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: helper for empty req cache checksPavel Begunkov
Add io_req_cache_empty(), which checks if there are requests in the inline req cache or not. It'll be needed in the future, but also nicely cleans up a few spots poking into ->free_list directly. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/b18662389f3fb483d0bd07906647f65f6037475a.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: inline io_flush_cached_reqsPavel Begunkov
io_flush_cached_reqs() isn't descriptive and has only one caller, inline it into __io_alloc_req_refill(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/ec38abe65a883d9fe6b169793119ce86806655a4.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: shrink final link flushPavel Begunkov
All good users should not set IOSQE_IO_*LINK flags for the last request of a link. io_uring flushes collected links at the end of submission, but it's not the optimal way and so we don't care too much about it. Replace io_queue_sqe() call with io_queue_sqe_fallback() as the former one is inlined and will generate a bunch of extra code. This will also help compilers with the submission path inlining. > size ./fs/io_uring.o text data bss dec hex filename 87265 13734 8 101007 18a8f ./fs/io_uring.o > size ./fs/io_uring.o text data bss dec hex filename 87073 13734 8 100815 189cf ./fs/io_uring.o Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/01fb5e417ef49925d544a0b0bae30409845ed2b4.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: memcpy CQE from reqPavel Begunkov
We can do CQE filling a bit more efficiently when req->cqe is fully filled by memcpy()'ing it to the userspace instead of doing it field by field. It's easier on register spilling, removes a couple of extra loads/stores and write combines two u32 memory writes. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/ee3f514ff28b1fe3347a8eca93a9d91647f2eaad.1649771823.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: explicitly keep a CQE in io_kiocbPavel Begunkov
We already have req->{result,user_data,cflags}, which mimic struct io_uring_cqe and are intended to store CQE data. Combine them into a struct io_uring_cqe field. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/e1efe65d5005cd6a9ec3440767eb15a9fa9351cf.1649771823.git.asml.silence@gmail.com [axboe: add mirror cqe to cater to fd union] Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: rename io_sqe_file_registerPavel Begunkov
Rename io_sqe_file_register(), so the name better reflects what the function is doing. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/d5091518883786969e244d2f0854a47bbdaa5061.1649334991.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: deduplicate SCM accountingPavel Begunkov
Merge io_sqe_file_register() and io_sqe_file_register(). The only real difference left between them is from where we get an skb. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/dddda3039c71fcbec24b3465cbe8c7e7ae7bb0e8.1649334991.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: don't pass around fixed index for scmPavel Begunkov
There is an old API nuisance where io_uring's SCM accounting functions traverse fixed file tables and so requires them to be set in advance, which leads to some implicit rules of how io_sqe_file_register() should be used. __io_sqe_files_scm() now works with only one file at a time, pass a file directly and get rid of all fixed table dereferencing inside. Clean io_sqe_file_register() callers. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/fb32031d892e61a7748c70da7999725d5e798671.1649334991.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: refactor __io_sqe_files_scmPavel Begunkov
__io_sqe_files_scm() is now called only from one place passing a single file, so nr argument can be killed and __io_sqe_files_scm() simplified. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/66b492bc66dc8356d45d64076bb31d677d11a7c9.1649334991.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: uniform SCM accountingPavel Begunkov
Channel all SCM accounting through io_sqe_file_register(), so we do it uniformely for updates and initial registration and can kill duplicated code. Registration might be slightly slower in some case, but first we skip most of SCM accounting now so it's not a problem. Moreover, it's nicer for an empty set registration as we don't even try to allocate skb for them anymore. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/6c9afbeb22812777d0c43e52353b63db5b87ed1e.1649334991.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: don't scm-account for non af_unix socketsPavel Begunkov
io_uring deals with file reference loops by registering all fixed files in the SCM/GC infrastrucure. However, only a small subset of all file types can keep long-term references to other files and those that don't are not interesting for the garbage collector as they can't be in a reference loop. They neither can be directly recycled by GC nor affect loop searching. Let's skip io_uring SCM accounting for loop-less files, i.e. all but af_unix sockets, quite imroving fixed file updates performance and greatly helpnig with memory footprint. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/9c44ecf6e89d69130a8c4360cce2183ffc5ddd6f.1649277098.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: move finish_wait() outside of loop in cqring_wait()Jens Axboe
We don't need to call this for every loop. This is particularly troublesome if we are task_work intensive, and get woken more often than we desire due to that. Just do it at the end, that's always safe as we initialize the waitqueue list head anyway. This can save a considerable amount of hammering on the waitqueue lock, which is also hot from the request completion side. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: refactor io_req_add_compl_list()Pavel Begunkov
A small refactoring for io_req_add_compl_list() deduplicating some code. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/f0a5272b45efe4ffc41cb79b99784e39c699aade.1648209006.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: silence io_for_each_link() warningPavel Begunkov
Some tooling keep complaining about self assignment in io_for_each_link(), the code is correct but still let's workaround it. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/f0de77b0b0f8309554ba6fba34327b7813bcc3ff.1648209006.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: partially uninline io_put_task()Pavel Begunkov
In most cases io_put_task() is called from the submitter task and go through a higly optimised fast path, which has to be inlined. The other branch though is bulkier and we don't care about it as much because it implies atomics and other heavy calls. Extract it into a helper, which is expected not to be inlined. [before] size ./fs/io_uring.o text data bss dec hex filename 89328 13646 8 102982 19246 ./fs/io_uring.o [after] size ./fs/io_uring.o text data bss dec hex filename 89096 13646 8 102750 1915e ./fs/io_uring.o Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/dec213db0e0b8605132da81e0a0be687a4d140cb.1648209006.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: cleanup conditional submit lockingPavel Begunkov
Refactor io_ring_submit_[un]lock(), make it accept issue_flags and remove manual IO_URING_F_UNLOCKED checks. It also allows us to place lockdep annotations inside instead of sprinkling them in a bunch of places. There is only one user that doesn't fit now, so hand code locking in __io_rsrc_put_work(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/e55c2c06767676a801252e8094c9ab09912487a4.1648209006.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: optimise mutex locking for submit+iopollPavel Begunkov
Both submittion and iopolling requires holding uring_lock. IOPOLL can users do them together in a single syscall, however it would still do 2 pairs of lock/unlock. Optimise this case combining locking into one lock/unlock pair, which especially nice for low QD. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/034b6c41658648ad3ad3c9485ac8eb546f010bc4.1647957378.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: pre-calculate syscall iopolling decisionPavel Begunkov
Syscall should only iopoll for events when it's a IOPOLL ring and is not SQPOLL. Instead of check both flags every time we can save it in ring flags so it's easier to use. We don't care much about an extra if there, however it will be inconvenient to copy-paste this chunk with checks in future patches. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/7fd2f8fc2606305aa06dd8c0ff8f76a66b39c383.1647957378.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: split off IOPOLL argument verifictionPavel Begunkov
IOPOLL doesn't use additional arguments like sigsets, but it still needs some basic verification, which is currently done by io_get_ext_arg(). This patch adds a separate function for the IOPOLL path, which is a bit simpler and doesn't do extra. This prepares us for further patches, which would have hurt inlining in the hot path otherwise. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/71b23fca412e3374b74be7711cfd42a3d9d5dfe0.1647957378.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: clean up io_queue_next()Pavel Begunkov
Move fast check out of io_queue_next(), it makes req->flags checks in __io_submit_flush_completions() a bit clearer and grants us better comtrol, e.g. can remove now not justified unlikely() in __io_submit_flush_completions(). Also, we don't care about having this check in io_free_req() as the function is a slow path and io_req_find_next() handles it correctly. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/1f9e1cc80adbb11b37017d511df4a2c6141a3f08.1647897811.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: move poll recycling later in compl flushingPavel Begunkov
There is a new (req->flags & REQ_F_POLLED) check in __io_submit_flush_completions() for poll recycling, however io_free_batch_list() is a much better place for it. First, we prefer it after putting the last req ref just to avoid potential problems in the future. Also, it'll enable the recycling for IOPOLL and also will place it closer to all other req->flags bits clean up requests. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/31dfe1dafda66ba3ce36b301884ec7e162c777d1.1647897811.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: optimise io_free_batch_listPavel Begunkov
We do several req->flags checks in the fast path of io_free_batch_list(). One explicit check of REQ_F_REFCOUNT, and two other hidden in io_queue_next() and io_dismantle_req(). Moreover, there is a io_req_put_rsrc_locked() call in between, so there is no hope req->flags will be preserved in registers. All those flags if not a slow path than definitely a slower path, so put them all under a single flags mask check and save several mem reloads and ifs. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/0fb493f73f2009aea395c570c2932fecaa4e1244.1647897811.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: refactor io_req_find_nextPavel Begunkov
Move the fast path from io_req_find_next() into callers. It prepares us for further changes. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/10bd0e564472dde0c7f8d90ae317d05356cd565a.1647897811.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: remove extra ifs around io_commit_cqringPavel Begunkov
Now io_commit_cqring() is simple and it tolerates well being called without a new CQE filled, so kill a bunch of not needed anymore guards. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/36aed692dff402bba00a444a63a9cd2e97a340ea.1647897811.git.asml.silence@gmail.com [axboe: fold in followup fix] Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24io_uring: small optimisation of tctx_task_workPavel Begunkov
There should be no completions stashed when we first get into tctx_task_work(), so move completion flushing checks a bit later after we had a chance to execute some task works. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/c6765c804f3c438591b9825ab9c43d22039073c4.1647897811.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-04-24Linux 5.18-rc4v5.18-rc4Linus Torvalds
2022-04-24Merge tag 'sched_urgent_for_v5.18_rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fix from Borislav Petkov: - Fix a corner case when calculating sched runqueue variables That fix also removes a check for a zero divisor in the code, without mentioning it. Vincent clarified that it's ok after I whined about it: https://lore.kernel.org/all/CAKfTPtD2QEyZ6ADd5WrwETMOX0XOwJGnVddt7VHgfURdqgOS-Q@mail.gmail.com/ * tag 'sched_urgent_for_v5.18_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/pelt: Fix attach_entity_load_avg() corner case
2022-04-24Merge tag 'powerpc-5.18-3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: - Partly revert a change to our timer_interrupt() that caused lockups with high res timers disabled. - Fix a bug in KVM TCE handling that could corrupt kernel memory. - Two commits fixing Power9/Power10 perf alternative event selection. Thanks to Alexey Kardashevskiy, Athira Rajeev, David Gibson, Frederic Barrat, Madhavan Srinivasan, Miguel Ojeda, and Nicholas Piggin. * tag 'powerpc-5.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/perf: Fix 32bit compile powerpc/perf: Fix power10 event alternatives powerpc/perf: Fix power9 event alternatives KVM: PPC: Fix TCE handling for VFIO powerpc/time: Always set decrementer in timer_interrupt()
2022-04-24Merge tag 'perf_urgent_for_v5.18_rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Borislav Petkov: - Add Sapphire Rapids CPU support - Fix a perf vmalloc-ed buffer mapping error (PERF_USE_VMALLOC in use) * tag 'perf_urgent_for_v5.18_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/cstate: Add SAPPHIRERAPIDS_X CPU support perf/core: Fix perf_mmap fail when CONFIG_PERF_USE_VMALLOC enabled
2022-04-24Merge tag 'edac_urgent_for_v5.18_rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras Pull EDAC fix from Borislav Petkov: - Read the reported error count from the proper register on synopsys_edac * tag 'edac_urgent_for_v5.18_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: EDAC/synopsys: Read the error count from the correct register
2022-04-24kvmalloc: use vmalloc_huge for vmalloc allocationsLinus Torvalds
Since commit 559089e0a93d ("vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLOW_HUGE_VMAP"), the use of hugepage mappings for vmalloc is an opt-in strategy, because it caused a number of problems that weren't noticed until x86 enabled it too. One of the issues was fixed by Nick Piggin in commit 3b8000ae185c ("mm/vmalloc: huge vmalloc backing pages should be split rather than compound"), but I'm still worried about page protection issues, and VM_FLUSH_RESET_PERMS in particular. However, like the hash table allocation case (commit f2edd118d02d: "page_alloc: use vmalloc_huge for large system hash"), the use of kvmalloc() should be safe from any such games, since the returned pointer might be a SLUB allocation, and as such no user should reasonably be using it in any odd ways. We also know that the allocations are fairly large, since it falls back to the vmalloc case only when a kmalloc() fails. So using a hugepage mapping seems both safe and relevant. This patch does show a weakness in the opt-in strategy: since the opt-in flag is in the 'vm_flags', not the usual gfp_t allocation flags, very few of the usual interfaces actually expose it. That's not much of an issue in this case that already used one of the fairly specialized low-level vmalloc interfaces for the allocation, but for a lot of other vmalloc() users that might want to opt in, it's going to be very inconvenient. We'll either have to fix any compatibility problems, or expose it in the gfp flags (__GFP_COMP would have made a lot of sense) to allow normal vmalloc() users to use hugepage mappings. That said, the cases that really matter were probably already taken care of by the hash tabel allocation. Link: https://lore.kernel.org/all/20220415164413.2727220-1-song@kernel.org/ Link: https://lore.kernel.org/all/CAHk-=whao=iosX1s5Z4SF-ZGa-ebAukJoAdUJFk5SPwnofV+Vg@mail.gmail.com/ Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Paul Menzel <pmenzel@molgen.mpg.de> Cc: Song Liu <songliubraving@fb.com> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-04-24page_alloc: use vmalloc_huge for large system hashSong Liu
Use vmalloc_huge() in alloc_large_system_hash() so that large system hash (>= PMD_SIZE) could benefit from huge pages. Note that vmalloc_huge only allocates huge pages for systems with HAVE_ARCH_HUGE_VMALLOC. Signed-off-by: Song Liu <song@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Rik van Riel <riel@surriel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-04-23Merge tag '5.18-rc3-ksmbd-fixes' of git://git.samba.org/ksmbdLinus Torvalds
Pull ksmbd server fixes from Steve French: - cap maximum sector size reported to avoid mount problems - reference count fix - fix filename rename race * tag '5.18-rc3-ksmbd-fixes' of git://git.samba.org/ksmbd: ksmbd: set fixed sector size to FS_SECTOR_SIZE_INFORMATION ksmbd: increment reference count of parent fp ksmbd: remove filename in ksmbd_file
2022-04-23Merge tag 'arc-5.18-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta: - Assorted fixes * tag 'arc-5.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: remove redundant READ_ONCE() in cmpxchg loop ARC: atomic: cleanup atomic-llsc definitions arc: drop definitions of pgd_index() and pgd_offset{, _k}() entirely ARC: dts: align SPI NOR node name with dtschema ARC: Remove a redundant memset() ARC: fix typos in comments ARC: entry: fix syscall_trace_exit argument
2022-04-23Merge tag 'scsi-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fix from James Bottomley: "One fix for an information leak caused by copying a buffer to userspace without checking for error first in the sr driver" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: sr: Do not leak information in ioctl
2022-04-23Merge tag 'for-linus-5.18-rc4-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: "A simple cleanup patch and a refcount fix for Xen on Arm" * tag 'for-linus-5.18-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: arm/xen: Fix some refcount leaks xen: Convert kmap() to kmap_local_page()
2022-04-23Merge tag 'drm-fixes-2022-04-23' of git://anongit.freedesktop.org/drm/drmLinus Torvalds
Pull more drm fixes from Dave Airlie: "Maarten was away, so Maxine stepped up and sent me the drm-fixes merge, so no point leaving it for another week. The big change is an OF revert around bridge/panels, it may have some driver fallout, but hopefully this revert gets them shook out in the next week easier. Otherwise it's a bunch of locking/refcounts across drivers, a radeon dma_resv logic fix and some raspberry pi panel fixes. panel: - revert of patch that broke panel/bridge issues dma-buf: - remove unused header file. amdgpu: - partial revert of locking change radeon: - fix dma_resv logic inversion panel: - pi touchscreen panel init fixes vc4: - build fix - runtime pm refcount fix vmwgfx: - refcounting fix" * tag 'drm-fixes-2022-04-23' of git://anongit.freedesktop.org/drm/drm: drm/amdgpu: partial revert "remove ctx->lock" v2 Revert "drm: of: Lookup if child node has panel or bridge" Revert "drm: of: Properly try all possible cases for bridge/panel detection" drm/vc4: Use pm_runtime_resume_and_get to fix pm_runtime_get_sync() usage drm/vmwgfx: Fix gem refcounting and memory evictions drm/vc4: Fix build error when CONFIG_DRM_VC4=y && CONFIG_RASPBERRYPI_FIRMWARE=m drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare drm/panel/raspberrypi-touchscreen: Avoid NULL deref if not initialised dma-buf-map: remove renamed header file drm/radeon: fix logic inversion in radeon_sync_resv
2022-04-23Merge tag 'input-for-v5.18-rc3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input fixes from Dmitry Torokhov: - a new set of keycodes to be used by marine navigation systems - minor fixes to omap4-keypad and cypress-sf drivers * tag 'input-for-v5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: add Marine Navigation Keycodes Input: omap4-keypad - fix pm_runtime_get_sync() error checking Input: cypress-sf - register a callback to disable the regulators
2022-04-23Merge tag 'block-5.18-2022-04-22' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "Just two small regression fixes for bcache" * tag 'block-5.18-2022-04-22' of git://git.kernel.dk/linux-block: bcache: fix wrong bdev parameter when calling bio_alloc_clone() in do_bio_hook() bcache: put bch_bio_map() back to correct location in journal_write_unlocked()
2022-04-23Merge tag 'io_uring-5.18-2022-04-22' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull io_uring fixes from Jens Axboe: "Just two small fixes - one fixing a potential leak for the iovec for larger requests added in this cycle, and one fixing a theoretical leak with CQE_SKIP and IOPOLL" * tag 'io_uring-5.18-2022-04-22' of git://git.kernel.dk/linux-block: io_uring: fix leaks on IOPOLL and CQE_SKIP io_uring: free iovec if file assignment fails
2022-04-23Merge tag 'perf-tools-fixes-for-v5.18-2022-04-22' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf tools fixes from Arnaldo Carvalho de Melo: - Fix header include for LLVM >= 14 when building with libclang. - Allow access to 'data_src' for auxtrace in 'perf script' with ARM SPE perf.data files, fixing processing data with such attributes. - Fix error message for test case 71 ("Convert perf time to TSC") on s390, where it is not supported. * tag 'perf-tools-fixes-for-v5.18-2022-04-22' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: perf test: Fix error message for test case 71 on s390, where it is not supported perf report: Set PERF_SAMPLE_DATA_SRC bit for Arm SPE event perf script: Always allow field 'data_src' for auxtrace perf clang: Fix header include for LLVM >= 14
2022-04-23sparc: cacheflush_32.h needs struct pageRandy Dunlap
Add a struct page forward declaration to cacheflush_32.h. Fixes this build warning: CC drivers/crypto/xilinx/zynqmp-sha.o In file included from arch/sparc/include/asm/cacheflush.h:11, from include/linux/cacheflush.h:5, from drivers/crypto/xilinx/zynqmp-sha.c:6: arch/sparc/include/asm/cacheflush_32.h:38:37: warning: 'struct page' declared inside parameter list will not be visible outside of this definition or declaration 38 | void sparc_flush_page_to_ram(struct page *page); Exposed by commit 0e03b8fd2936 ("crypto: xilinx - Turn SHA into a tristate and allow COMPILE_TEST") but not Fixes: that commit because the underlying problem is older. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kernel test robot <lkp@intel.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: David S. Miller <davem@davemloft.net> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: sparclinux@vger.kernel.org Acked-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-04-23Merge tag 'drm-misc-fixes-2022-04-22' of ↵Dave Airlie
git://anongit.freedesktop.org/drm/drm-misc into drm-fixes Two fixes for the raspberrypi panel initialisation, one fix for a logic inversion in radeon, a build and pm refcounting fix for vc4, two reverts for drm_of_get_bridge that caused a number of regression and a locking regression for amdgpu. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20220422084403.2xrhf3jusdej5yo4@houat
2022-04-22Merge tag 'ext4_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 fixes from Ted Ts'o: "Fix some syzbot-detected bugs, as well as other bugs found by I/O injection testing. Change ext4's fallocate to consistently drop set[ug]id bits when an fallocate operation might possibly change the user-visible contents of a file. Also, improve handling of potentially invalid values in the the s_overhead_cluster superblock field to avoid ext4 returning a negative number of free blocks" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: jbd2: fix a potential race while discarding reserved buffers after an abort ext4: update the cached overhead value in the superblock ext4: force overhead calculation if the s_overhead_cluster makes no sense ext4: fix overhead calculation to account for the reserved gdt blocks ext4, doc: fix incorrect h_reserved size ext4: limit length to bitmap_maxbytes - blocksize in punch_hole ext4: fix use-after-free in ext4_search_dir ext4: fix bug_on in start_this_handle during umount filesystem ext4: fix symlink file size not match to file content ext4: fix fallocate to use file_modified to update permissions consistently
2022-04-22Merge tag 'ata-5.18-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata Pull ATA fix from Damien Le Moal: "A single fix to avoid a NULL pointer dereference in the pata_marvell driver with adapters not supporting DMA, from Zheyu" * tag 'ata-5.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata: ata: pata_marvell: Check the 'bmdma_addr' beforing reading
2022-04-22Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull kvm fixes from Paolo Bonzini: "The main and larger change here is a workaround for AMD's lack of cache coherency for encrypted-memory guests. I have another patch pending, but it's waiting for review from the architecture maintainers. RISC-V: - Remove 's' & 'u' as valid ISA extension - Do not allow disabling the base extensions 'i'/'m'/'a'/'c' x86: - Fix NMI watchdog in guests on AMD - Fix for SEV cache incoherency issues - Don't re-acquire SRCU lock in complete_emulated_io() - Avoid NULL pointer deref if VM creation fails - Fix race conditions between APICv disabling and vCPU creation - Bugfixes for disabling of APICv - Preserve BSP MSR_KVM_POLL_CONTROL across suspend/resume selftests: - Do not use bitfields larger than 32-bits, they differ between GCC and clang" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm: selftests: introduce and use more page size-related constants kvm: selftests: do not use bitfields larger than 32-bits for PTEs KVM: SEV: add cache flush to solve SEV cache incoherency issues KVM: SVM: Flush when freeing encrypted pages even on SME_COHERENT CPUs KVM: SVM: Simplify and harden helper to flush SEV guest page(s) KVM: selftests: Silence compiler warning in the kvm_page_table_test KVM: x86/pmu: Update AMD PMC sample period to fix guest NMI-watchdog x86/kvm: Preserve BSP MSR_KVM_POLL_CONTROL across suspend/resume KVM: SPDX style and spelling fixes KVM: x86: Skip KVM_GUESTDBG_BLOCKIRQ APICv update if APICv is disabled KVM: x86: Pend KVM_REQ_APICV_UPDATE during vCPU creation to fix a race KVM: nVMX: Defer APICv updates while L2 is active until L1 is active KVM: x86: Tag APICv DISABLE inhibit, not ABSENT, if APICv is disabled KVM: Initialize debugfs_dentry when a VM is created to avoid NULL deref KVM: Add helpers to wrap vcpu->srcu_idx and yell if it's abused KVM: RISC-V: Use kvm_vcpu.srcu_idx, drop RISC-V's unnecessary copy KVM: x86: Don't re-acquire SRCU lock in complete_emulated_io() RISC-V: KVM: Restrict the extensions that can be disabled RISC-V: KVM: Remove 's' & 'u' as valid ISA extension
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-30 01:17:44 +0000