On Sep 23, 2014, at 10:53 AM, Will Deacon <will.dea...@arm.com> wrote:
> On Tue, Sep 23, 2014 at 02:59:38PM +0100, Will Deacon wrote: >> On Tue, Sep 23, 2014 at 02:33:06PM +0100, Weston Andros Adamson wrote: >>> Any more info on how to reproduce this would be really great. Unfortunately >>> I don’t >>> have access to an arm64 system. >> >> I've not spotted a pattern other than using 64k pages, yet. If I manage to >> get a reproducer, I'll let you know. >> >>> If it’s possible, could we get a packet trace around when this happens? >>> This is pure >>> speculation, but this might have something to do the resend path - a commit >>> fails >>> and all the requests on the commit list have to be resent. >> >> Sure, once I can reproduce it reliably, then I'll try to do that. > > Right, a bunch of DDing from /dev/zero over an ssh session triggers this > very quickly. I've put a binary tcpdump here: > > http://www.willdeacon.ukfsn.org/bitbucket/oopsen/nfs/tcpdump.bin > > You may want to filter out the ssh packets. The only `interesting' thing to > me is a retransmission about half way through, but I don't know what I'm > looking for. > > The NFS server is 10.1.203.204 and the client is 10.1.203.24. Thanks! You are using NFSv2, so there are no commits - that rules out my hunch. -dros -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
