Messages in this thread | | | Date | Tue, 18 Oct 2011 15:12:28 -0400 (EDT) | Subject | Re: [PATCH] Fix guest memory leak and panic | From | David Miller <> |
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From: Krishna Kumar <krkumar2@in.ibm.com> Date: Tue, 18 Oct 2011 13:35:23 +0530
> Commit 86ee8130 ("virtionet: convert to SKB paged frag API") > introduced a bug in guest. During RX testing, guest runs out > of memory within seconds, causing oom-killer; which then > panics the system: "Kernel panic - not syncing: Out of memory > and no killable processes...". /proc/meminfo just before the > panic shows MemFree is a few MB's: > > MemFree: 1928544 kB (starts here) > ... > ... > MemFree: 27488 kB > MemFree: 26248 kB > MemFree: 24636 kB > MemFree: 22632 kB > MemFree: 19580 kB > MemFree: 17928 kB > MemFree: 15548 kB > (Panic) > > The extra reference to the fragment pages causes those pages to > not get freed in skb_release_data(). The following patch fixes > the bug. I have not checked if any other converted driver has > the same issue. > > Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
I'll wait for Ian's full audit, but Krishna please use more appropriate subject lines in future patch submissions.
This patch is fixing a problem in the virtio_net driver, so please mention that: "Subject: [PATCH] virtio_net: Fix guest memory leak and panic"
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