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| author | Nick Piggin | 2008-07-26 04:45:26 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2008-07-26 21:00:06 +0200 |
| commit | bc40d73c950146725e9e768e856a416ec8949065 (patch) | |
| tree | 7d12351ddeb6a281ff7a9b5db543067c710d1859 /CREDITS | |
| parent | dio: use get_user_pages_fast (diff) | |
| download | kernel-qcow2-linux-bc40d73c950146725e9e768e856a416ec8949065.tar.gz kernel-qcow2-linux-bc40d73c950146725e9e768e856a416ec8949065.tar.xz kernel-qcow2-linux-bc40d73c950146725e9e768e856a416ec8949065.zip | |
splice: use get_user_pages_fast
Use get_user_pages_fast in splice. This reverts some mmap_sem batching
there, however the biggest problem with mmap_sem tends to be hold times
blocking out other threads rather than cacheline bouncing. Further: on
architectures that implement get_user_pages_fast without locks, mmap_sem
can be avoided completely anyway.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Reviewed-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions