netdev - Re: [PATCHv1 net] xen-netback: notify immediately after pushing Tx response.

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Message-Id: <20150311.233127.1616833687415787157.davem@davemloft.net>
Date:	Wed, 11 Mar 2015 23:31:27 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	david.vrabel@...rix.com
Cc:	netdev@...r.kernel.org, xen-devel@...ts.xenproject.org,
	ian.campbell@...rix.com, wei.liu2@...rix.com
Subject: Re: [PATCHv1 net] xen-netback: notify immediately after pushing Tx
 response.

From: David Vrabel <david.vrabel@...rix.com>
Date: Wed, 11 Mar 2015 15:27:59 +0000

> This fixes a performance regression introduced by
> 7fbb9d8415d4a51cf542e87cf3a717a9f7e6aedc (xen-netback: release pending
> index before pushing Tx responses)
> 
> Moving the notify outside of the spin locks means it can be delayed a
> long time (if the dealloc thread is descheduled or there is an
> interrupt or softirq).
> 
> Signed-off-by: David Vrabel <david.vrabel@...rix.com>

Applied, thanks David.
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