linux-kernel - Re: [Xen-devel] [PATCH v1] xen/grant-table: log the lack of grants

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

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@...cle.com>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Reviewed-by: Junxiao Bi <junxiao.bi@...cle.com>

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


Thanks,

Juergen