erofs: avoid noisy messages for transient -ENOMEM

Browse source

[ Upstream commit 9aa64b62a7 ]

EROFS may allocate temporary pages using GFP_NOWAIT | GFP_NORETRY
when pcl->besteffort is off (e.g., for readahead requests).

If the allocation fails, the original request will fall back to
synchronous read, so the failure is transient.

Such fallback can frequently happen in low memory scenarios, but since
these failures are expected and temporary, avoid printing error
messages like below:

[ 7425.184264] erofs (device sr0): failed to decompress (lz4) -ENOMEM @ pa 148447232 size 28672 => 26788
[ 7426.244267] erofs (device sr0): failed to decompress (lz4) -ENOMEM @ pa 149422080 size 28672 => 15903
[ 7426.245508] erofs (device sr0): failed to decompress (lz4) -ENOMEM @ pa 138440704 size 28672 => 39294
...
[ 7504.258373] erofs (device sr0): failed to decompress (lz4) -ENOMEM @ pa 93581312 size 20480 => 47366

Fixes: 831faabed8 ("erofs: improve decompression error reporting")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Gao Xiang 2025-12-26 14:09:45 +08:00 • committed by Greg Kroah-Hartman

parent d2801dac52

commit 6a34547913

1 changed files with 4 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

7

fs/erofs/zdata.c

View file