From: David Vrabel <david.vrabel@citrix.com>
To: Stefan Bader <stefan.bader@canonical.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
konrad.wilk@oracle.com
Cc: daniel.kiper@oracle.com, xen-devel@lists.xen.org
Subject: Re: [PATCH v2] xen/balloon: Don't continue ballooning when BP_ECANCELED is encountered
Date: Wed, 22 Oct 2014 15:52:51 +0100 [thread overview]
Message-ID: <5447C4C3.4010101@citrix.com> (raw)
In-Reply-To: <5447C25B.3060701@canonical.com>
On 22/10/14 15:42, Stefan Bader wrote:
> On 09.10.2014 19:17, David Vrabel wrote:
>> On 07/10/14 22:00, Boris Ostrovsky wrote:
>>> Commit 3dcf63677d4e ("xen/balloon: cancel ballooning if adding new
>>> memory failed") makes reserve_additional_memory() return BP_ECANCELED
>>> when an error is encountered. This error, however, is ignored by the
>>> caller (balloon_process()) since it is overwritten by subsequent call
>>> to update_schedule(). This results in continuous attempts to add more
>>> memory, all of which are likely to fail again.
>>>
>>> We should stop trying to schedule next iteration of ballooning when
>>> the current one has failed.
>>
>> What triggers this bug? I could never work out what it was.
>>
>> Applied to stable/for-linus-3.18
>
> I just checked in the kernel upstream repo and cannot find this but I believe
> the initial pull was already made. Or was there a revert that I missed?
I've not sent the pull request for it yet.
David
prev parent reply other threads:[~2014-10-22 14:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-07 21:00 [PATCH v2] xen/balloon: Don't continue ballooning when BP_ECANCELED is encountered Boris Ostrovsky
2014-10-08 7:30 ` Daniel Kiper
2014-10-08 7:30 ` Daniel Kiper
2014-10-09 17:17 ` David Vrabel
2014-10-09 17:42 ` Boris Ostrovsky
2014-10-22 14:42 ` Stefan Bader
2014-10-22 14:52 ` David Vrabel [this message]
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