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authorPhillip Lougher <phillip@squashfs.org.uk>2013-11-18 02:31:36 +0000
committerPhillip Lougher <phillip@squashfs.org.uk>2013-11-20 03:58:03 +0000
commitd208383d640727b70cd6689bc17e67e9b5ebf4ff (patch)
tree03a6146c22473beb13e2ebda605d6a332ddb758b /fs/squashfs/xz_wrapper.c
parentcd59c2ec5f37a2bc1315c9324aab6c21d43ffa1a (diff)
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Squashfs: add multi-threaded decompression using percpu variable
Add a multi-threaded decompression implementation which uses percpu variables. Using percpu variables has advantages and disadvantages over implementations which do not use percpu variables. Advantages: * the nature of percpu variables ensures decompression is load-balanced across the multiple cores. * simplicity. Disadvantages: it limits decompression to one thread per core. Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
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