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| author | Vlastimil Babka <vbabka@suse.cz> | 2025-09-26 15:50:25 +0200 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2025-09-29 09:46:17 +0200 |
| commit | ca74b8cadaad4b179f77f1f4dc3d288be9a580f1 (patch) | |
| tree | b630614b598a5b9405a93edb8e6850c26dc3787f /mm/internal.h | |
| parent | b9120619246d733a27e5e93c29e86f2e0401cfc5 (diff) | |
| parent | af92793e52c3a99b828ed4bdd277fd3e11c18d08 (diff) | |
Merge series "slab: Re-entrant kmalloc_nolock()"
From the cover letter [1]:
This patch set introduces kmalloc_nolock() which is the next logical
step towards any context allocation necessary to remove bpf_mem_alloc
and get rid of preallocation requirement in BPF infrastructure.
In production BPF maps grew to gigabytes in size. Preallocation wastes
memory. Alloc from any context addresses this issue for BPF and other
subsystems that are forced to preallocate too.
This long task started with introduction of alloc_pages_nolock(), then
memcg and objcg were converted to operate from any context including
NMI, this set completes the task with kmalloc_nolock() that builds on
top of alloc_pages_nolock() and memcg changes.
After that BPF subsystem will gradually adopt it everywhere.
Link: https://lore.kernel.org/all/20250909010007.1660-1-alexei.starovoitov@gmail.com/ [1]
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 45b725c3dc03..9904421cabc1 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -842,6 +842,10 @@ static inline struct page *alloc_frozen_pages_noprof(gfp_t gfp, unsigned int ord #define alloc_frozen_pages(...) \ alloc_hooks(alloc_frozen_pages_noprof(__VA_ARGS__)) +struct page *alloc_frozen_pages_nolock_noprof(gfp_t gfp_flags, int nid, unsigned int order); +#define alloc_frozen_pages_nolock(...) \ + alloc_hooks(alloc_frozen_pages_nolock_noprof(__VA_ARGS__)) + extern void zone_pcp_reset(struct zone *zone); extern void zone_pcp_disable(struct zone *zone); extern void zone_pcp_enable(struct zone *zone); |