Messages in this thread | | | Date | Mon, 15 Jun 2009 11:01:41 -0400 (EDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 0/3] Fix malloc() stall in zone_reclaim() and bring behaviour more in line with expectations V3 |
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On Mon, 15 Jun 2009, Mel Gorman wrote:
> > May I ask your worry? > > > > Simply that I believe the intention of PF_SWAPWRITE here was to allow > zone_reclaim() to aggressively reclaim memory if the reclaim_mode allowed > it as it was a statement that off-node accesses are really not desired.
Right.
> Ok. I am not fully convinced but I'll not block it either if believe it's > necessary. My current understanding is that this patch only makes a difference > if the server is IO congested in which case the system is struggling anyway > and an off-node access is going to be relatively small penalty overall. > Conceivably, having PF_SWAPWRITE set makes things worse in that situation > and the patch makes some sense.
We could drop support for RECLAIM_SWAP if that simplifies things.
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