erofs: avoid allocating DEFLATE streams before mounting

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commit 80eb4f6205 upstream.

Currently, each DEFLATE stream takes one 32 KiB permanent internal
window buffer even if there is no running instance which uses DEFLATE
algorithm.

It's unexpected and wasteful on embedded devices with limited resources
and servers with hundreds of CPU cores if DEFLATE is enabled but unused.

Fixes: ffa09b3bd0 ("erofs: DEFLATE compression support")
Cc: <stable@vger.kernel.org> # 6.6+
Reviewed-by: Sandeep Dhavale <dhavale@google.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240520090106.2898681-1-hsiangkao@linux.alibaba.com
[ Gao Xiang: resolve trivial conflicts. ]
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Gao Xiang 2024-05-20 17:01:06 +08:00 • committed by Greg Kroah-Hartman

parent 184873af87

commit 15cc248e7e

1 changed files with 29 additions and 26 deletions

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fs/erofs/decompressor_deflate.c

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