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erofs: avoid memory allocation failure during rolling decompression

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Currently, err would be treated as io error. Therefore, it'd be
better to ensure memory allocation during rolling decompression
to avoid such io error.

In the long term, we might consider adding another !Uptodate case
for such case.

Link: https://lore.kernel.org/r/20210316031515.90954-1-huangjianan@oppo.com
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
This commit is contained in:
Huang Jianan
2021-03-16 11:15:14 +08:00
committed by Jaegeuk Kim
parent 1571cef7ef
commit e901d97d09
1 changed files with 2 additions and 3 deletions
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5
fs/erofs/decompressor.c
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@@ -73,9 +73,8 @@ 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);
if (!victim)
return -ENOMEM;
victim = erofs_allocpage(pagepool,
GFP_KERNEL | __GFP_NOFAIL);
set_page_private(victim, Z_EROFS_SHORTLIVED_PAGE);
}
rq->out[i] = victim;