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From: Olaf Hering <olaf@aepfle.de>
To: Wei Liu <wei.liu2@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <ian.jackson@eu.citrix.com>,
	xen-devel@lists.xen.org
Subject: Re: [PATCH v6 3/3] tools/libxc: use superpages during restore of HVM guest
Date: Wed, 30 Aug 2017 17:53:57 +0200	[thread overview]
Message-ID: <20170830155357.GC31711@aepfle.de> (raw)
In-Reply-To: <20170830151401.rpalev2shohsmgwr@citrix.com>


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On Wed, Aug 30, Wei Liu wrote:

> > Can this actually happen with the available senders? If not, this is
> > again the missing memory map.
> Probably not now, but as said, you shouldn't rely on the structure of
> the stream unless it is stated in the spec.

Well, what can happen with todays implementation on the sender side is
the case of a ballooned guest with enough holes within a batch. These
will trigger 1G allocations before the releasing of memory happens. To
solve this, the releasing of memory has to happen more often, probably
after crossing each 2M boundary.


Olaf

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      reply	other threads:[~2017-08-30 15:53 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-26 10:33 [PATCH v6 0/3] tools/libxc: use superpages Olaf Hering
2017-08-26 10:33 ` [PATCH v6 1/3] tools/libxc: move SUPERPAGE macros to common header Olaf Hering
2017-08-26 10:33 ` [PATCH v6 2/3] tools/libxc: add API for bitmap access for restore Olaf Hering
2017-08-26 10:33 ` [PATCH v6 3/3] tools/libxc: use superpages during restore of HVM guest Olaf Hering
2017-08-29  9:58   ` Olaf Hering
2017-08-30 13:48   ` Wei Liu
2017-08-30 14:27     ` Olaf Hering
2017-08-30 15:14       ` Wei Liu
2017-08-30 15:53         ` Olaf Hering [this message]

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