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From: Juergen Gross <jgross@suse.com>
To: Wengang Wang <wen.gang.wang@oracle.com>,
	xen-devel@lists.xensource.com, linux-kernel@vger.kernel.org
Cc: junxiao.bi@oracle.com
Subject: Re: [Xen-devel] [PATCH v1] xen/grant-table: log the lack of grants
Date: Tue, 18 Jul 2017 09:11:20 +0200	[thread overview]
Message-ID: <3938171e-1f90-613f-7337-b17984a2aa66@suse.com> (raw)
In-Reply-To: <20170707182344.9646-1-wen.gang.wang@oracle.com>

On 07/07/17 20:23, Wengang Wang wrote:
> log a message when we enter this situation:
> 1) we already allocated the max number of available grants from hypervisor
> and
> 2) we still need more (but the request fails because of 1)).
> 
> Sometimes the lack of grants causes IO hangs in xen_blkfront devices.
> Adding this log would help debuging.
> 
> Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com>

Reviewed-by: Juergen Gross <jgross@suse.com>


Thanks,

Juergen

  parent reply	other threads:[~2017-07-18  7:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-07 18:23 Wengang Wang
2017-07-13 17:42 ` Wengang
2017-07-14 14:18   ` [Xen-devel] " Julien Grall
2017-07-18  7:11 ` Juergen Gross [this message]
2017-07-18  8:00 ` Juergen Gross

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