From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 60620] guest loses frequently (multiple times per day!) connectivity to network device
Date: Tue, 12 Nov 2013 14:26:03 +0000 [thread overview]
Message-ID: <bug-60620-28872-zmqCwpAIRo@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-60620-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=60620
--- Comment #19 from Jason Wang <jasowang@redhat.com> ---
(In reply to Folkert van Heusden from comment #18)
> (In reply to Jason Wang from comment #17)
> > Created attachment 114331 [details]
> > patch to limit the head length of skb allocated
> > Would you care to test this patch to see if it solves your problem?
>
> I'm not an expert in kernel programming but wouldn't an oversized skb only
> affect the current incoming packet and not the whole interface stability?
Yes, the patch was just to limit the head length of a packet received by
tun/tap. Without this patch, host may try to allocate 64K contiguous memory at
one time which has a high possibility of failure when memory is fragmented or
under heavy stress. So this patch make sure only one page were allocated at one
time.
> Because what I see is that indeed packets get dropped and then after a while
> communication totally stops and also does not recover anymore (unless I
> rmmod/modprobe virtio_net).
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prev parent reply other threads:[~2013-11-12 14:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 19:31 [Bug 60620] New: guest loses frequently (multiple times per day!) connectivity to network device bugzilla-daemon
2013-07-24 19:32 ` [Bug 60620] " bugzilla-daemon
2013-07-30 15:59 ` bugzilla-daemon
2013-07-30 18:42 ` bugzilla-daemon
2013-07-30 18:58 ` bugzilla-daemon
2013-07-30 19:03 ` bugzilla-daemon
2013-07-30 20:45 ` bugzilla-daemon
2013-07-31 19:43 ` bugzilla-daemon
2013-08-02 10:38 ` bugzilla-daemon
2013-08-02 11:03 ` bugzilla-daemon
2013-08-02 11:28 ` bugzilla-daemon
2013-08-02 12:34 ` Stefan Hajnoczi
2013-10-20 19:55 ` bugzilla-daemon
2013-10-20 20:34 ` bugzilla-daemon
2013-10-20 20:36 ` bugzilla-daemon
2013-10-30 8:58 ` bugzilla-daemon
2013-10-30 15:19 ` bugzilla-daemon
2013-11-11 3:22 ` bugzilla-daemon
2013-11-11 9:53 ` bugzilla-daemon
2013-11-12 10:05 ` bugzilla-daemon
2013-11-12 11:09 ` bugzilla-daemon
2013-11-12 14:26 ` bugzilla-daemon [this message]
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