From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Mike Snitzer <snitzer@kernel.org>, Sasha Levin <sashal@kernel.org>,
        agk@redhat.com, dm-devel@redhat.com
Subject: [PATCH AUTOSEL 5.15 23/25] dm thin: add cond_resched() to various workqueue loops
Date:   Sun, 26 Feb 2023 21:08:46 -0500
Message-Id: <20230227020855.1051605-23-sashal@kernel.org>
In-Reply-To: <20230227020855.1051605-1-sashal@kernel.org>
References: <20230227020855.1051605-1-sashal@kernel.org>
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From: Mike Snitzer <snitzer@kernel.org>

[ 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>
---
 drivers/md/dm-thin.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index cce26f46ded52..f7124f257703c 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2217,6 +2217,7 @@ 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);
 }
@@ -2299,6 +2300,7 @@ static void process_thin_deferred_cells(struct thin_c *tc)
 			else
 				pool->process_cell(tc, cell);
 		}
+		cond_resched();
 	} while (!list_empty(&cells));
 }
 
-- 
2.39.0