mm/zsmalloc: fix migrate_write_lock() when !CONFIG_COMPACTION

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Patch series "mm/zsmalloc: fix and optimize objects/page migration".

This series is to fix and optimize the zsmalloc objects/page migration.


This patch (of 3):

migrate_write_lock() is a empty function when !CONFIG_COMPACTION, in which
case zs_compact() can be triggered from shrinker reclaim context.  (Maybe
it's better to rename it to zs_shrink()?)

And zspage map object users rely on this migrate_read_lock() so object
won't be migrated elsewhere.

Fix it by always implementing the migrate_write_lock() related functions.

Link: https://lkml.kernel.org/r/20240219-b4-szmalloc-migrate-v1-0-34cd49c6545b@bytedance.com
Link: https://lkml.kernel.org/r/20240219-b4-szmalloc-migrate-v1-1-34cd49c6545b@bytedance.com
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

This commit is contained in:

Chengming Zhou 2024-02-19 13:33:51 +00:00 • committed by Andrew Morton

parent 75c40c2509

commit 568b567f78

1 changed files with 3 additions and 6 deletions

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mm/zsmalloc.c

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