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mm: vmalloc: streamline vmalloc memory accounting

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Use a vmstat counter instead of a custom, open-coded atomic. This has
the added benefit of making the data available per-node, and prepares
for cleaning up the memcg accounting as well.

Link: https://lkml.kernel.org/r/20260223160147.3792777-1-hannes@cmpxchg.org
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Johannes Weiner
2026-02-23 11:01:06 -05:00
committed by Andrew Morton
parent 6b0dd42d76
commit b9ec0ed907
5 changed files with 14 additions and 13 deletions
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mm/vmstat.c
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@@ -1255,6 +1255,7 @@ const char * const vmstat_text[] = {
[I(NR_KERNEL_MISC_RECLAIMABLE)] = "nr_kernel_misc_reclaimable",
[I(NR_FOLL_PIN_ACQUIRED)] = "nr_foll_pin_acquired",
[I(NR_FOLL_PIN_RELEASED)] = "nr_foll_pin_released",
[I(NR_VMALLOC)] = "nr_vmalloc",
[I(NR_KERNEL_STACK_KB)] = "nr_kernel_stack",
#if IS_ENABLED(CONFIG_SHADOW_CALL_STACK)
[I(NR_KERNEL_SCS_KB)] = "nr_shadow_call_stack",