linux-kernel - Re: [Xen-devel] [PATCH v2 1/5] xen/blkback: don't keep persistent grants too long

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Date:   Wed, 8 Aug 2018 17:19:41 +0200
From:   Roger Pau Monné <roger.pau@...rix.com>
To:     Juergen Gross <jgross@...e.com>
CC:     <linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>,
        <linux-block@...r.kernel.org>, <axboe@...nel.dk>,
        <boris.ostrovsky@...cle.com>
Subject: Re: [Xen-devel] [PATCH v2 1/5] xen/blkback: don't keep persistent
 grants too long

On Wed, Aug 08, 2018 at 04:25:24PM +0200, Juergen Gross wrote:
> Persistent grants are allocated until a threshold per ring is being
> reached. Those grants won't be freed until the ring is being destroyed
> meaning there will be resources kept busy which might no longer be
> used.
> 
> Instead of freeing only persistent grants until the threshold is
> reached add a timestamp and remove all persistent grants not having
> been in use for a minute.
> 
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Roger Pau Monné <roger.pau@...rix.com>

Thanks, Roger.