From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: haifeng.lin@huawei.com, jerry.lilijun@huawei.com,
n.nikolaev@virtualopensystems.com, qemu-devel@nongnu.org,
milo.raofei@huawei.com, arei.gonglei@huawei.com
Subject: Re: [Qemu-devel] [PATCH v1] vhost-user: fix not send all hugepage files to vhost-user
Date: Wed, 04 Feb 2015 15:02:19 +0100 [thread overview]
Message-ID: <54D2266B.5050305@redhat.com> (raw)
In-Reply-To: <20150204135200.GA16345@redhat.com>
On 04/02/2015 14:52, Michael S. Tsirkin wrote:
> I'm not sure: does memory core ever give us two adjacent
> RAM segments that we *can* merge?
I don't think so. Memory core merges ranges already if the following holds:
- same memory region
- same dirty logging mode
- same readonly behavior (ignore reads, trap reads as MMIO, read/write)
- r2 end address is the same as r1 start address
- r2's offset in the memory region is equal to r1's plus the size of r1
Paolo
> If yes it would trigger, and extra memory slots slow down lookups
> linearly so they aren't free.
next prev parent reply other threads:[~2015-02-04 14:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-17 6:02 [Qemu-devel] [PATCH v1] vhost-user: fix not send all hugepage files to vhost-user haifeng.lin
2014-12-18 5:06 ` Linhaifeng
2015-01-29 3:58 ` Linhaifeng
2015-01-29 10:51 ` Michael S. Tsirkin
2015-01-29 13:02 ` Linhaifeng
2015-02-01 23:29 ` Paolo Bonzini
2015-02-03 13:09 ` Linhaifeng
2015-02-04 13:52 ` Michael S. Tsirkin
2015-02-04 14:02 ` Paolo Bonzini [this message]
2015-02-15 12:07 ` Linhaifeng
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