From: David Vrabel <david.vrabel@citrix.com>
To: Juergen Gross <jgross@suse.com>, <linux-kernel@vger.kernel.org>,
<xen-devel@lists.xensource.com>, <konrad.wilk@oracle.com>,
<david.vrabel@citrix.com>, <boris.ostrovsky@oracle.com>
Subject: Re: [Xen-devel] [Patch V2] xen: release lock occasionally during ballooning
Date: Mon, 20 Jul 2015 14:11:59 +0100 [thread overview]
Message-ID: <55ACF39F.9030000@citrix.com> (raw)
In-Reply-To: <1437392979-6591-1-git-send-email-jgross@suse.com>
On 20/07/15 12:49, Juergen Gross wrote:
> When dom0 is being ballooned balloon_process() will hold the balloon
> mutex until it is finished. This will block e.g. creation of new
> domains as the device backends for the new domain need some
> autoballooned pages for the ring buffers.
>
> Avoid this by releasing the balloon mutex from time to time during
> ballooning. Adjust the comment above balloon_process() regarding
> multiple instances of balloon_process().
>
> Instead of open coding it, just use cond_resched().
Applied to for-linus-4.2, thanks.
David
WARNING: multiple messages have this Message-ID (diff)
From: David Vrabel <david.vrabel@citrix.com>
To: Juergen Gross <jgross@suse.com>,
linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com,
konrad.wilk@oracle.com, david.vrabel@citrix.com,
boris.ostrovsky@oracle.com
Subject: Re: [Xen-devel] [Patch V2] xen: release lock occasionally during ballooning
Date: Mon, 20 Jul 2015 14:11:59 +0100 [thread overview]
Message-ID: <55ACF39F.9030000@citrix.com> (raw)
In-Reply-To: <1437392979-6591-1-git-send-email-jgross@suse.com>
On 20/07/15 12:49, Juergen Gross wrote:
> When dom0 is being ballooned balloon_process() will hold the balloon
> mutex until it is finished. This will block e.g. creation of new
> domains as the device backends for the new domain need some
> autoballooned pages for the ring buffers.
>
> Avoid this by releasing the balloon mutex from time to time during
> ballooning. Adjust the comment above balloon_process() regarding
> multiple instances of balloon_process().
>
> Instead of open coding it, just use cond_resched().
Applied to for-linus-4.2, thanks.
David
next prev parent reply other threads:[~2015-07-20 13:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-20 11:49 [Patch V2] xen: release lock occasionally during ballooning Juergen Gross
2015-07-20 13:11 ` David Vrabel [this message]
2015-07-20 13:11 ` [Xen-devel] " David Vrabel
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