| commit | c28cc36469554dc55540f059fbdc7fa22a2c31fc | [log] [tgz] |
|---|---|---|
| author | Nick Piggin <npiggin@kernel.dk> | Fri Jan 07 17:49:53 2011 +1100 |
| committer | Nick Piggin <npiggin@kernel.dk> | Fri Jan 07 17:50:27 2011 +1100 |
| tree | 6b867456be48b8633a2d56a99e00bb3faf9dccc7 | |
| parent | 31e6b01f4183ff419a6d1f86177cbf4662347cec [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>