linux-kernel - [PATCH 1/2] erofs: avoid memory allocation failure during rolling decompression

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Date:   Fri,  5 Mar 2021 14:22:18 +0800
From:   Huang Jianan <huangjianan@...o.com>
To:     linux-erofs@...ts.ozlabs.org
Cc:     huangjianan@...o.com, guoweichao@...o.com, zhangshiming@...o.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] erofs: avoid memory allocation failure during rolling decompression

It should be better to ensure memory allocation during rolling
decompression to avoid io error.

Signed-off-by: Huang Jianan <huangjianan@...o.com>
Signed-off-by: Guo Weichao <guoweichao@...o.com>
---
 fs/erofs/decompressor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
index 49347e681a53..fb0fa4e5b9ea 100644
--- a/fs/erofs/decompressor.c
+++ b/fs/erofs/decompressor.c
@@ -86,7 +86,7 @@ static int z_erofs_lz4_prepare_destpages(struct z_erofs_decompress_req *rq,
 			victim = availables[--top];
 			get_page(victim);
 		} else {
-			victim = erofs_allocpage(pagepool, GFP_KERNEL);
+			victim = erofs_allocpage(pagepool, GFP_KERNEL | __GFP_NOFAIL);
 			if (!victim)
 				return -ENOMEM;
 			set_page_private(victim, Z_EROFS_SHORTLIVED_PAGE);
-- 
2.25.1