Commit 4c6bdb36 authored by Miaohe Lin's avatar Miaohe Lin Committed by akpm

mm/z3fold: fix sheduling while atomic

Patch series "A few fixup patches for z3fold".

This series contains a few fixup patches to fix sheduling while atomic,
fix possible null pointer dereferencing, fix various race conditions and
so on. More details can be found in the respective changelogs.


This patch (of 9):

z3fold's page_lock is always held when calling alloc_slots.  So gfp should
be GFP_ATOMIC to avoid "scheduling while atomic" bug.

Link: https://lkml.kernel.org/r/20220429064051.61552-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20220429064051.61552-2-linmiaohe@huawei.com
Fixes: fc548865 ("z3fold: simplify freeing slots")
Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Reviewed-by: default avatarVitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 86d28b07
......@@ -941,8 +941,7 @@ static inline struct z3fold_header *__z3fold_alloc(struct z3fold_pool *pool,
}
if (zhdr && !zhdr->slots)
zhdr->slots = alloc_slots(pool,
can_sleep ? GFP_NOIO : GFP_ATOMIC);
zhdr->slots = alloc_slots(pool, GFP_ATOMIC);
return zhdr;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment