3 Commits

Author	SHA1	Message	Date
Phillip Lougher	ed4f381ec1	Squashfs: Check stream is not NULL in decompressor_multi.c ... Fix static checker complaint that stream is not checked in squashfs_decompressor_destroy(). Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reviewed-by: Minchan Kim <minchan@kernel.org>	2013-11-20 03:59:20 +00:00
Phillip Lougher	846b730e99	Squashfs: Generalise paging handling in the decompressors ... Further generalise the decompressors by adding a page handler abstraction. This adds helpers to allow the decompressors to access and process the output buffers in an implementation independant manner. This allows different types of output buffer to be passed to the decompressors, with the implementation specific aspects handled at decompression time, but without the knowledge being held in the decompressor wrapper code. This will allow the decompressors to handle Squashfs cache buffers, and page cache pages. This patch adds the abstraction and an implementation for the caches. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reviewed-by: Minchan Kim <minchan@kernel.org>	2013-11-20 03:59:01 +00:00
Minchan Kim	cd59c2ec5f	squashfs: Enhance parallel I/O ... Now squashfs have used for only one stream buffer for decompression so it hurts parallel read performance so this patch supports multiple decompressor to enhance performance parallel I/O. Four 1G file dd read on KVM machine which has 2 CPU and 4G memory. dd if=test/test1.dat of=/dev/null & dd if=test/test2.dat of=/dev/null & dd if=test/test3.dat of=/dev/null & dd if=test/test4.dat of=/dev/null & old : 1m39s -> new : 9s * From v1 * Change comp_strm with decomp_strm - Phillip * Change/add comments - Phillip Signed-off-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>	2013-11-20 03:35:18 +00:00