From: Anthony Liguori <anthony@codemonkey.ws>
To: Mark McLoughlin <markmc@redhat.com>
Cc: Scott Tsai <scottt.tw@gmail.com>,
Sven Rudolph <Sven_Rudolph@drewag.de>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 5/5] tap: drain queue in tap_send()
Date: Fri, 30 Oct 2009 12:46:28 -0500 [thread overview]
Message-ID: <4AEB2674.9030106@codemonkey.ws> (raw)
In-Reply-To: <1256920444.6899.145.camel@blaa>
Mark McLoughlin wrote:
> On Fri, 2009-10-30 at 11:21 -0500, Anthony Liguori wrote:
>
>> Mark McLoughlin wrote:
>>
>>> Okay, let's try re-enabling the drain-entire-queue behaviour, with a
>>> difference - before each subsequent packet, use qemu_can_send_packet()
>>> to check that we can send it. This is similar to how we check before
>>> polling the tap fd and avoids having to drop a packet if the receiver
>>> cannot handle it.
>>>
>>> This patch should be a performance improvement since we no longer have
>>> to go through the mainloop for each packet.
>>>
>>> Signed-off-by: Mark McLoughlin <markmc@redhat.com>
>>>
>>>
>> Could you rebase and rend this patch against master? I've got 1-4 in
>> staging.
>>
>> The GSO changes make resolving this non trivial (for me at least :-)).
>>
>
> Um, you've lost me :-)
>
> You've got it in staging AFAICS, and anyway ... 5/5 is mostly a revert
> of 1/5, so if 1/5 applied so should 5/5
>
> What's in staging looks fine to me, except it doesn't build because of
> problems with other patches
>
Ignore it, I accidentally tried backporting the patch targeted for the
stable tree and then responded to the wrong patch.
Regards,
Anthony Liguori
next prev parent reply other threads:[~2009-10-30 17:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-27 18:16 [Qemu-devel] [PATCH 0/5] Fix packet queueing to allow full tap queue drain Mark McLoughlin
2009-10-27 18:16 ` [Qemu-devel] [PATCH 1/5] tap: disable draining queue in one go Mark McLoughlin
2009-10-27 18:16 ` [Qemu-devel] [PATCH 2/5] net: disable receiving if client returns zero Mark McLoughlin
2009-10-27 18:16 ` [Qemu-devel] [PATCH 3/5] net/queue: queue packets even if sender doesn't supply a callback Mark McLoughlin
2009-10-27 18:16 ` [Qemu-devel] [PATCH 4/5] virtio-net: split the has_buffers() logic from can_receive() Mark McLoughlin
2009-10-27 18:16 ` [Qemu-devel] [PATCH 5/5] tap: drain queue in tap_send() Mark McLoughlin
2009-10-30 16:21 ` Anthony Liguori
2009-10-30 16:34 ` Mark McLoughlin
2009-10-30 17:46 ` Anthony Liguori [this message]
2009-10-28 3:36 ` [Qemu-devel] Re: [PATCH 0/5] Fix packet queueing to allow full tap queue drain Scott Tsai
2009-10-28 8:49 ` Mark McLoughlin
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