md: restore 'noio_flag' for the last mddev_resume()

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[ Upstream commit e24ed04389 ]

memalloc_noio_save() is called for the first mddev_suspend(), and
repeated mddev_suspend() only increase 'suspended'. However,
memalloc_noio_restore() is also called for the first mddev_resume(),
which means that memory reclaim will be enabled before the last
mddev_resume() is called, while the array is still suspended.

Fix this problem by restore 'noio_flag' for the last mddev_resume().

Fixes: 78f57ef9d5 ("md: use memalloc scope APIs in mddev_suspend()/mddev_resume()")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20230628012931.88911-3-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Yu Kuai 2023-06-28 09:29:31 +08:00 • committed by Greg Kroah-Hartman

parent 8267f81190

commit a5dc1f8342

1 changed files with 4 additions and 2 deletions

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drivers/md/md.c

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