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Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support |
Date: |
Fri, 12 Mar 2010 22:40:41 +0000 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Andrea Arcangeli wrote:
> On Fri, Mar 12, 2010 at 06:41:56PM +0000, Paul Brook wrote:
> > Doesn't non-PAE (i.e. most 32-bit x86) use 4M huge pages? There's still a
> > good
> > number of those knocking about.
>
> Yep, but 32bit x86 host won't support transparent hugepage (certain
> bits overflows in the kernel implementation, there's no more space in
> the page struct). It's not worth it IMHO.
Perhaps the performance figures would be even more significant for
32-bit x86 than 64-bit, due to the smaller TLBs.
I guess that's not what you mean by worth it?
-- Jamie
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, (continued)
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Paul Brook, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Andrea Arcangeli, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Paul Brook, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Andrea Arcangeli, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Paul Brook, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Andrea Arcangeli, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Paul Brook, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Andrea Arcangeli, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Paul Brook, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Andrea Arcangeli, 2010/03/12
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support,
Jamie Lokier <=
- Re: [Qemu-devel] [PATCH QEMU] transparent hugepage support, Paul Brook, 2010/03/12