The patch titled
Subject: mm/mempool: use might_alloc()
has been added to the -mm mm-unstable branch. Its filename is
mm-mempool-use-might_alloc.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mempool-use-might_alloc.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Daniel Vetter <daniel.vetter@xxxxxxxx>
Subject: mm/mempool: use might_alloc()
Date: Sun, 5 Jun 2022 17:25:39 +0200
mempool are generally used for GFP_NOIO, so this wont benefit all that
much because might_alloc currently only checks GFP_NOFS. But it does
validate against mmu notifier pte zapping, some might catch some drivers
doing really silly things, plus it's a bit more meaningful in what we're
checking for here.
Link: https://lkml.kernel.org/r/20220605152539.3196045-3-daniel.vetter@xxxxxxxx
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mempool.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/mempool.c~mm-mempool-use-might_alloc
+++ a/mm/mempool.c
@@ -379,7 +379,7 @@ void *mempool_alloc(mempool_t *pool, gfp
gfp_t gfp_temp;
VM_WARN_ON_ONCE(gfp_mask & __GFP_ZERO);
- might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM);
+ might_alloc(gfp_mask);
gfp_mask |= __GFP_NOMEMALLOC; /* don't allocate emergency reserves */
gfp_mask |= __GFP_NORETRY; /* don't loop in __alloc_pages */
_
Patches currently in -mm which might be from daniel.vetter@xxxxxxxx are
mm-page_alloc-use-might_alloc.patch
mm-slab-delete-cache_alloc_debugcheck_before.patch
mm-mempool-use-might_alloc.patch
