[patch 200/262] zram_drv: allow reclaim on bio_alloc

Andrew Morton
2021-11-05T20:45:12Z

From: Jaewon Kim <jaewon31.kim@samsung.com>
Subject: zram_drv: allow reclaim on bio_alloc

The read_from_bdev_async is not called on atomic context. So GFP_NOIO is
available rather than GFP_ATOMIC. If there were reclaimable pages with
GFP_NOIO, we can avoid allocation failure and page fault failure.

Link: https://lkml.kernel.org/r/20210908005241.28062-1-jaewon31.kim@samsung.com
Signed-off-by: Jaewon Kim <jaewon31.kim@samsung.com>
Reported-by: Yong-Taek Lee <ytk.lee@samsung.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

drivers/block/zram/zram_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/block/zram/zram_drv.c~zram_drv-allow-reclaim-on-bio_alloc
+++ a/drivers/block/zram/zram_drv.c
@@ -587,7 +587,7 @@ static int read_from_bdev_async(struct z
{
struct bio *bio;

- bio = bio_alloc(GFP_ATOMIC, 1);
+ bio = bio_alloc(GFP_NOIO, 1);
if (!bio)
return -ENOMEM;

_