linux/linux-stable.git - Linux kernel stable tree

Age	Commit message (Collapse)	Author
2008-12-23	Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', ↵	Ingo Molnar
	'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core
2008-12-16	Merge commit 'v2.6.28-rc8' into x86/doc	Ingo Molnar

2008-12-16	x86: convert rdtscll() to use __native_read_tsc	Ken Chen
	Impact: micro-optimization Is there any reason why x86 rdtscll have to use the out of line function instead of inline __native_read_tsc()? native_read_tsc and __native_read_tsc is essentially the same functions. Patch to let x86 rdtscll() to use the inline version of read_tsc. Signed-off-by: Ken Chen <kenchen@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-08	sched: improve sched_clock() performance	Ingo Molnar
	in scheduler-intense workloads native_read_tsc() overhead accounts for 20% of the system overhead: 659567 system_call 41222.9375 686796 schedule 435.7843 718382 __switch_to 665.1685 823875 switch_mm 4526.7857 1883122 native_read_tsc 55385.9412 9761990 total 2.8468 this is large part due to the rdtsc_barrier() that is done before and after reading the TSC. But sched_clock() is not a precise clock in the GTOD sense, using such barriers is completely pointless. So remove the barriers and only use them in vget_cycles(). This improves lat_ctx performance by about 5%. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-28	x86: clean up comments wrt. rd{msr\|tsc\|pmc}	Jike Song
	The rdmsr instruction(et al) for i386 and x86-64 are semantically same. The only difference is how gcc interpret constraint "A" for these targets. Signed-off-by: Jike Song <albcamus@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-22	x86: Fix ASM_X86__ header guards	H. Peter Anvin
	Change header guards named "ASM_X86__" to "_ASM_X86_" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-22	x86, um: ... and asm-x86 move	Al Viro
	Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>