From: Marcelo Tosatti <mtosatti@redhat.com>
To: Igor Mammedov <imammedo@redhat.com>
Cc: aarcange@redhat.com, peter.maydell@linaro.org, gleb@redhat.com,
quintela@redhat.com, jan.kiszka@siemens.com,
qemu-devel@nongnu.org, aliguori@amazon.com, pbonzini@redhat.com,
afaerber@suse.de, rth@twiddle.net
Subject: Re: [Qemu-devel] [RFC PATCH] pc: align gpa<->hpa on 1GB boundary by splitting RAM on several regions
Date: Wed, 30 Oct 2013 17:03:46 -0200 [thread overview]
Message-ID: <20131030190346.GA19287@amt.cnet> (raw)
In-Reply-To: <20131030185129.GB18378@amt.cnet>
On Wed, Oct 30, 2013 at 04:51:29PM -0200, Marcelo Tosatti wrote:
> On Wed, Oct 30, 2013 at 05:49:49PM +0100, Igor Mammedov wrote:
> > On Tue, 29 Oct 2013 19:38:44 -0200
> > Marcelo Tosatti <mtosatti@redhat.com> wrote:
> >
> > > On Tue, Oct 29, 2013 at 07:18:49PM +0100, Igor Mammedov wrote:
> > > > Otherwise 1GB TLBs cannot be cached for the range.
> > >
> > > This fails to back non-1GB-aligned gpas, but 2MB aligned, with 2MB large
> > > pages.
> > With current command line only one hugetlbfs mount point is possible, so it
> > will back with whatever alignment specified hugetlbfs mount point has.
> > Anything that doesn't fit into page aligned region goes to tail using
> > non hugepage baked phys_mem_set_alloc()=qemu_anon_ram_alloc() allocator.
>
> The patch you propose allocates the non-1GB aligned tail of RAM with 4k
> pages. As mentioned, this is not acceptable (2MB pages should be used
> whenever 1GB alignment is not possible).
Tail and 3-4GB region.
next prev parent reply other threads:[~2013-10-30 19:04 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-24 21:11 [Qemu-devel] [patch 0/2] align >4GB guest RAM to a 1GB boundary, in case of 1GB-sized hugetlbfs Marcelo Tosatti
2013-10-24 21:11 ` [Qemu-devel] [patch 1/2] exec: add qemu_get_ram_hpagesize Marcelo Tosatti
2013-10-24 21:12 ` [Qemu-devel] [patch 2/2] i386: pc: align gpa<->hpa on 1GB boundary Marcelo Tosatti
2013-10-24 21:55 ` Peter Maydell
2013-10-24 22:48 ` Marcelo Tosatti
2013-10-24 23:55 ` Paolo Bonzini
2013-10-25 4:58 ` Marcelo Tosatti
2013-10-25 8:52 ` Paolo Bonzini
2013-10-25 19:50 ` Marcelo Tosatti
2013-10-25 22:53 ` Paolo Bonzini
2013-10-30 11:07 ` Gerd Hoffmann
2013-10-30 11:47 ` Paolo Bonzini
2013-10-25 9:57 ` igor Mammedov
2013-10-25 13:34 ` Marcelo Tosatti
2013-10-27 15:20 ` igor Mammedov
2013-10-28 14:04 ` Marcelo Tosatti
2013-10-28 14:20 ` Marcelo Tosatti
2013-10-29 18:00 ` Igor Mammedov
2013-10-29 21:21 ` Marcelo Tosatti
2013-10-30 8:48 ` Gleb Natapov
2013-10-30 18:30 ` Marcelo Tosatti
2013-10-29 18:18 ` [Qemu-devel] [RFC PATCH] pc: align gpa<->hpa on 1GB boundary by splitting RAM on several regions Igor Mammedov
2013-10-29 21:38 ` Marcelo Tosatti
2013-10-30 16:49 ` Igor Mammedov
2013-10-30 18:51 ` Marcelo Tosatti
2013-10-30 19:03 ` Marcelo Tosatti [this message]
2013-10-30 19:56 ` Igor Mammedov
2013-10-30 23:44 ` Marcelo Tosatti
2013-11-07 15:25 ` Igor Mammedov
2013-10-30 19:31 ` Marcelo Tosatti
2013-10-30 20:28 ` Paolo Bonzini
2013-11-06 1:49 ` [Qemu-devel] i386: pc: align gpa<->hpa on 1GB boundary (v2) Marcelo Tosatti
2013-11-06 1:55 ` [Qemu-devel] i386: pc: align gpa<->hpa on 1GB boundary (v3) Marcelo Tosatti
2013-11-06 11:59 ` Igor Mammedov
2013-11-06 12:07 ` Paolo Bonzini
2013-11-06 12:22 ` Igor Mammedov
2013-11-06 12:24 ` Paolo Bonzini
2013-11-06 21:31 ` [Qemu-devel] i386: pc: align gpa<->hpa on 1GB boundary (v4) Marcelo Tosatti
2013-11-06 21:40 ` Michael S. Tsirkin
2013-11-06 21:53 ` Marcelo Tosatti
2013-11-06 22:15 ` Michael S. Tsirkin
2013-11-06 22:24 ` Marcelo Tosatti
2013-11-07 15:24 ` Igor Mammedov
2013-11-07 21:53 ` Marcelo Tosatti
2013-11-10 20:47 ` [Qemu-devel] i386: pc: align gpa<->hpa on 1GB boundary (v5) Marcelo Tosatti
2013-11-12 12:45 ` Igor Mammedov
2013-11-12 20:32 ` Marcelo Tosatti
2013-11-12 21:16 ` [Qemu-devel] i386: pc: align gpa<->hpa on 1GB boundary (v6) Marcelo Tosatti
2013-11-13 13:59 ` Igor Mammedov
2013-11-13 17:13 ` Paolo Bonzini
[not found] ` <20131113195832.GA29433@amt.cnet>
2013-11-13 20:39 ` Marcelo Tosatti
2013-11-13 21:49 ` Paolo Bonzini
2013-11-13 19:08 ` Michael S. Tsirkin
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