From mboxrd@z Thu Jan 1 00:00:00 1970 From: mathieu.desnoyers@polymtl.ca (Mathieu Desnoyers) Date: Thu, 30 Apr 2009 09:50:05 -0400 Subject: [ltt-dev] [PATCH] Fix dirty page accounting in redirty_page_for_writepage() In-Reply-To: <20090430133859.GB8329@elte.hu> References: <20090429232546.GB15782@Krystal> <20090430024303.GB19875@Krystal> <20090430133859.GB8329@elte.hu> Message-ID: <20090430135005.GA5922@Krystal> * Ingo Molnar (mingo at elte.hu) wrote: > > * Christoph Lameter wrote: > > > On Wed, 29 Apr 2009, Mathieu Desnoyers wrote: > > > > > to have a good look at the memory accounting code. We could > > > probably benefit of Christoph Lameter's cpu ops (using segment > > > registers to address per-cpu variables with atomic inc/dec) in > > > there. Or at least removing interrupt disabling by using preempt > > > disable and local_t variables for the per-cpu counters could > > > bring some benefit. > > > > Guess we are ready for atomic per cpu ops now that the new per cpu > > allocator is in? Segment register issues with the PDA are also > > solved right? > > it's all done, implemented and upstream already. You are a bit late > to the party ;-) > > Ingo Or way too early, depending on the point of view. :-) e.g. http://lkml.org/lkml/2008/5/30/3 I think Christoph deserves credits for pioneering this area with fresh ideas. Mathieu -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68