From: Rusty Russell <rusty@rustcorp.com.au>
To: Amit Shah <amit.shah@redhat.com>
Cc: virtualization@lists.linux-foundation.org
Subject: Re: [PATCH] virtio_net: Check for room in the vq before adding buffer
Date: Thu, 27 Aug 2009 19:17:20 +0930 [thread overview]
Message-ID: <200908271917.21260.rusty@rustcorp.com.au> (raw)
In-Reply-To: <1251278908-18601-1-git-send-email-amit.shah@redhat.com>
On Wed, 26 Aug 2009 06:58:28 pm Amit Shah wrote:
> Saves us one cycle of alloc-add-free if the queue was full.
>
> Signed-off-by: Amit Shah <amit.shah@redhat.com>
Thanks, applied with one change:
> @@ -323,7 +323,7 @@ static bool try_fill_recv_maxbufs(struct virtnet_info *vi, gfp_t gfp)
> break;
> }
> vi->num++;
> - }
> + } while (err > 0);
This is better as "while (err >= num)". The other one is right (we only need
1 buffer), this one we need to be able to fit "num" entries.
Thanks!
Rusty.
next prev parent reply other threads:[~2009-08-27 9:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-26 9:28 [PATCH] virtio_net: Check for room in the vq before adding buffer Amit Shah
2009-08-27 9:47 ` Rusty Russell [this message]
2009-08-27 10:29 ` Amit Shah
2009-08-27 11:06 ` Rusty Russell
2009-08-27 11:18 ` Amit Shah
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