Messages in this thread | | | Date | Wed, 5 Oct 2005 18:35:40 -0300 | From | Marcelo Tosatti <> | Subject | Re: [RFC] mempool_alloc() pre-allocated object usage |
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Hi Paul,
On Mon, Oct 03, 2005 at 07:21:22PM +0300, Paul Mundt wrote: > On Mon, Oct 03, 2005 at 04:49:13PM +0200, Arjan van de Ven wrote: > > On Mon, 2005-10-03 at 17:36 +0300, Paul Mundt wrote: > > > Both usage patterns seem valid from my point of view, would you be open > > > to something that would accomodate both? (ie, possibly adding in a flag > > > to determine pre-allocated object usage?) Or should I not be using > > > mempool for contiguity purposes? > > > > a similar dillema was in the highmem bounce code in 2.4; what worked > > really well back then was to do it both; eg use half the pool for > > "immediate" use, then try a VM alloc, and use the second half of the > > pool for the really emergency cases. > > > Unfortunately this won't work very well in our case since it's > specifically high order allocations that we are after, and we don't have > the extra RAM to allow for this.
Out of curiosity, what is the requirement for higher order pages?
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