From: Sasha Levin <sashal@kernel.org>
To: stable-commits@vger.kernel.org, snitzer@kernel.org
Cc: dm-devel@redhat.com, Alasdair Kergon <agk@redhat.com>
Subject: [dm-devel] Patch "dm thin: add cond_resched() to various workqueue loops" has been added to the 6.1-stable tree
Date: Sat, 4 Mar 2023 22:06:15 -0500 [thread overview]
Message-ID: <20230305030615.1741406-1-sashal@kernel.org> (raw)
This is a note to let you know that I've just added the patch titled
dm thin: add cond_resched() to various workqueue loops
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-thin-add-cond_resched-to-various-workqueue-loops.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
commit 3df34207ecea5f1eb800240498a7cbd17111e30e
Author: Mike Snitzer <snitzer@kernel.org>
Date: Thu Feb 16 15:29:44 2023 -0500
dm thin: add cond_resched() to various workqueue loops
[ Upstream commit e4f80303c2353952e6e980b23914e4214487f2a6 ]
Otherwise on resource constrained systems these workqueues may be too
greedy.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 196f82559ad6b..d28c9077d6ed2 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2207,6 +2207,7 @@ static void process_thin_deferred_bios(struct thin_c *tc)
throttle_work_update(&pool->throttle);
dm_pool_issue_prefetches(pool->pmd);
}
+ cond_resched();
}
blk_finish_plug(&plug);
}
@@ -2289,6 +2290,7 @@ static void process_thin_deferred_cells(struct thin_c *tc)
else
pool->process_cell(tc, cell);
}
+ cond_resched();
} while (!list_empty(&cells));
}
--
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