diff options
| author | Miaohe Lin <[email protected]> | 2022-09-16 15:22:42 +0800 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2022-10-03 14:03:28 -0700 |
| commit | ce96fa6223ee851cb83118678f6e75f260852a80 (patch) | |
| tree | e9e5430ea036c9e32accf518dbbd072e1c3be204 | |
| parent | 3ae6d3e30a52a7af222f284d0bf5d424b4f2f365 (diff) | |
mm/page_alloc: ensure kswapd doesn't accidentally go to sleep
Patch series "A few cleanup patches for mm", v2.
This series contains a few cleanup patches to remove the obsolete comments
and functions, use helper macro to improve readability and so on. More
details can be found in the respective changelogs.
This patch (of 16):
If ALLOC_KSWAPD is set, wake_all_kswapds() will be called to ensure kswapd
doesn't accidentally go to sleep. But when reserve_flags is set,
alloc_flags will be overwritten and ALLOC_KSWAPD is thus lost. Preserve
the ALLOC_KSWAPD flag in alloc_flags to ensure kswapd won't go to sleep
accidentally.
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 0a79cdad5eb2 ("mm: use alloc_flags to record if kswapd can wake")
Signed-off-by: Miaohe Lin <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Cc: Anshuman Khandual <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | mm/page_alloc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c7e9451c69fc..24caa11db8ae 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5156,7 +5156,8 @@ retry: reserve_flags = __gfp_pfmemalloc_flags(gfp_mask); if (reserve_flags) - alloc_flags = gfp_to_alloc_flags_cma(gfp_mask, reserve_flags); + alloc_flags = gfp_to_alloc_flags_cma(gfp_mask, reserve_flags) | + (alloc_flags & ALLOC_KSWAPD); /* * Reset the nodemask and zonelist iterators if memory policies can be |