Messages in this thread | | | Date | Thu, 10 Jul 2008 13:51:29 -0400 | From | "H. Peter Anvin" <> | Subject | Re: [RFC 00/15] x86_64: Optimize percpu accesses |
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Eric W. Biederman wrote: > Christoph Lameter <cl@linux-foundation.org> writes: > >> H. Peter Anvin wrote: >> >>> but there is a distinct lack of wiggle room, which can be resolved >>> either by using negative offsets, or by moving the kernel text area up a >>> bit from -2 GB. >> Lets say we reserve 256MB of cpu alloc space per processor. > > First off right now reserving more than about 64KB is ridiculous. We rightly > don't have that many per cpu variables.
Almost half a megabyte in current allyesconfig, and that is not including dynamic allocations at all.
-hpa
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