[dm-devel] Patch "dm thin: add cond_resched() to various workqueue loops" has been added to the 6.1-stable tree

[dm-devel] Patch "dm thin: add cond_resched() to various workqueue loops" has been added to the 6.1-stable tree

[Sasha Levin]

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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