| From: |
| Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> |
| To: |
| akpm@linux-foundation.org, linux-kernel@vger.kernel.org |
| Subject: |
| [patch 00/23] Atomic operations updates: add cmpxchg_local |
| Date: |
| Sun, 12 Aug 2007 10:54:34 -0400 |
| Message-ID: |
| <20070812145434.520271946@polymtl.ca> |
| Cc: |
| Christoph Lameter <clameter@sgi.com> |
| Archive‑link: | |
Article |
Hi Andrew,
I have been asked for a cmpxchg_local implementation by Christoph Lameter so he
can use it to accelerate the slub allocator.
On some architectures, where cmpxchg is nothing more that a simple save/restore
interrupts surrounding the cmpxchg non atomic ops, I remove the code and make
them use the new "generic" version.
cmpxchg_local and cmpxchg64_local are made available on all architectures in
these patches. They use the best primitive known, either an atomic operation or
save/restore interrupts.
Mathieu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
