From: Alexander Graf <agraf@suse.de>
To: Paul Mackerras <paulus@samba.org>
Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 0/3] KVM: PPC: Book3S HV: More flexible allocator for linear memory
Date: Fri, 14 Sep 2012 01:32:23 +0200 [thread overview]
Message-ID: <9650229C-2512-4684-98EC-6E252E47C4A9@suse.de> (raw)
In-Reply-To: <20120912003427.GH32642@bloggs.ozlabs.ibm.com>
On 12.09.2012, at 02:34, Paul Mackerras wrote:
> This series of 3 patches makes it possible for guests to allocate
> whatever size of HPT they need from linear memory preallocated at
> boot, rather than being restricted to a single size of HPT (by
> default, 16MB) and having to use the kernel page allocator for
> anything else -- which in practice limits them to at most 16MB given
> the default value for the maximum page order. Instead of allocating
> many individual pieces of memory, this allocates a single contiguous
> area and uses a simple bitmap-based allocator to hand out pieces of it
> as required.
Have you tried to play with CMA for this? It sounds like it could buy us exactly what we need.
Alex
WARNING: multiple messages have this Message-ID (diff)
From: Alexander Graf <agraf@suse.de>
To: Paul Mackerras <paulus@samba.org>
Cc: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 0/3] KVM: PPC: Book3S HV: More flexible allocator for linear memory
Date: Thu, 13 Sep 2012 23:32:23 +0000 [thread overview]
Message-ID: <9650229C-2512-4684-98EC-6E252E47C4A9@suse.de> (raw)
In-Reply-To: <20120912003427.GH32642@bloggs.ozlabs.ibm.com>
On 12.09.2012, at 02:34, Paul Mackerras wrote:
> This series of 3 patches makes it possible for guests to allocate
> whatever size of HPT they need from linear memory preallocated at
> boot, rather than being restricted to a single size of HPT (by
> default, 16MB) and having to use the kernel page allocator for
> anything else -- which in practice limits them to at most 16MB given
> the default value for the maximum page order. Instead of allocating
> many individual pieces of memory, this allocates a single contiguous
> area and uses a simple bitmap-based allocator to hand out pieces of it
> as required.
Have you tried to play with CMA for this? It sounds like it could buy us exactly what we need.
Alex
next prev parent reply other threads:[~2012-09-13 23:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 0:34 [PATCH 0/3] KVM: PPC: Book3S HV: More flexible allocator for linear memory Paul Mackerras
2012-09-12 0:34 ` Paul Mackerras
2012-09-12 0:35 ` [PATCH 1/3] KVM: PPC: Book3S HV: Add a more " Paul Mackerras
2012-09-12 0:35 ` Paul Mackerras
2012-09-12 0:36 ` [PATCH 2/3] KVM: PPC: Book3S HV: Allocate user-requested size of HPT from preallocated pool Paul Mackerras
2012-09-12 0:36 ` Paul Mackerras
2012-09-12 0:36 ` [PATCH 3/3] KVM: PPC: Book3S HV: Add command-line option for amount of KVM linear memory Paul Mackerras
2012-09-12 0:36 ` Paul Mackerras
2012-09-13 23:32 ` Alexander Graf [this message]
2012-09-13 23:32 ` [PATCH 0/3] KVM: PPC: Book3S HV: More flexible allocator for " Alexander Graf
2012-09-14 8:11 ` Paul Mackerras
2012-09-14 8:11 ` Paul Mackerras
2012-09-14 12:13 ` Alexander Graf
2012-09-14 12:13 ` Alexander Graf
2012-09-14 12:13 ` Alexander Graf
2012-09-14 12:45 ` Paul Mackerras
2012-09-14 12:45 ` Paul Mackerras
2012-09-14 12:45 ` Paul Mackerras
2012-09-14 13:15 ` Alexander Graf
2012-09-14 13:15 ` Alexander Graf
2012-09-14 13:15 ` Alexander Graf
2012-10-26 1:17 ` Paul Mackerras
2012-10-26 1:17 ` Paul Mackerras
2012-10-26 1:17 ` Paul Mackerras
2012-10-30 9:12 ` Alexander Graf
2012-10-30 9:12 ` Alexander Graf
2012-10-30 9:12 ` Alexander Graf
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