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author | Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | 2015-06-25 15:00:32 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-25 17:00:37 -0700 |
commit | d93435c3fba4a47b773693b0c8992470d38510d5 (patch) | |
tree | 0eee23d9451b404c4f2aa9ad7e6a6fe970806cae /Documentation/vm | |
parent | 4bbacd51a683e45c13f7d6df6f85cb7391590311 (diff) | |
download | linux-d93435c3fba4a47b773693b0c8992470d38510d5.tar.gz |
zram: check comp algorithm availability earlier
Improvement idea by Marcin Jabrzyk. comp_algorithm_store() silently accepts any supplied algorithm name, because zram performs algorithm availability check later, during the device configuration phase in disksize_store() and emits the following error: "zram: Cannot initialise %s compressing backend" this error line is somewhat generic and, besides, can indicate a failed attempt to allocate compression backend's working buffers. add algorithm availability check to comp_algorithm_store(): echo lzz > /sys/block/zram0/comp_algorithm -bash: echo: write error: Invalid argument Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Reported-by: Marcin Jabrzyk <m.jabrzyk@samsung.com> Acked-by: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm')
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