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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:53 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:27 +1100
commitc28cc36469554dc55540f059fbdc7fa22a2c31fc (patch)
tree6b867456be48b8633a2d56a99e00bb3faf9dccc7 /lib/syscall.c
parent31e6b01f4183ff419a6d1f86177cbf4662347cec (diff)
fs: fs_struct use seqlock
Use a seqlock in the fs_struct to enable us to take an atomic copy of the complete cwd and root paths. Use this in the RCU lookup path to avoid a thread-shared spinlock in RCU lookup operations. Multi-threaded apps may now perform path lookups with scalability matching multi-process apps. Operations such as stat(2) become very scalable for multi-threaded workload. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'lib/syscall.c')
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