linux-kernel - [RFC PATCH 1/8] zram: cond_resched() in writeback loop

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Message-ID: <20241118103054.3191944-2-senozhatsky@chromium.org>
Date: Mon, 18 Nov 2024 19:30:32 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [RFC PATCH 1/8] zram: cond_resched() in writeback loop

Writeback loop can run for quite a while (depending on
wb device performance, compression algorithm and the
number of entries we writeback), so we need to do
cond_resched() there, similarly to what we do in
recompress loop.

Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
---
 drivers/block/zram/zram_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 3dee026988dc..882a32d46a75 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -883,6 +883,8 @@ static ssize_t writeback_store(struct device *dev,
 next:
 		zram_slot_unlock(zram, index);
 		release_pp_slot(zram, pps);
+
+		cond_resched();
 	}
 
 	if (blk_idx)
-- 
2.47.0.338.g60cca15819-goog