On Wed, 2011-06-22 at 15:40 -0700, Joshua Scoggins wrote: > The patch isn't applying to the 2.6.39 kernel sources. It does for me: [trondmy@lade linux-2.6]$ git checkout v2.6.39 HEAD is now at 61c4f2c... Linux 2.6.39 [trondmy@lade linux-2.6]$ git am ~/Desktop/bugfixes/0001-SUNRPC-Fix-a-potential-race-in-between-xprt_complete.patch Applying: SUNRPC: Fix a potential race in between xprt_complete_rqst and xprt_transmit [trondmy@lade linux-2.6]$ Are you perhaps using some distro kernel instead of the regular one from Linus' repository? Cheers Trond > -Josh > > On Wed, Jun 22, 2011 at 2:51 PM, Trond Myklebust > <Trond.Myklebust@xxxxxxxxxx> wrote: > > On Wed, 2011-06-22 at 12:18 -0700, Joshua Scoggins wrote: > >> According to the it guys they are running solaris 10 as the server platform. > > > > Ok. That should not be subject to the race I was thinking of... > > > >> On Wed, Jun 22, 2011 at 11:57 AM, Trond Myklebust > >> <Trond.Myklebust@xxxxxxxxxx> wrote: > >> > On Wed, 2011-06-22 at 11:37 -0700, Joshua Scoggins wrote: > >> >> Here are our mount options from auto.master > >> >> > >> >> /user -fstype=nfs4,sec=krb5p,noresvport,noatime > >> >> /group -fstype=nfs4,sec=krb5p,noresvport,noatime > >> >> > >> >> As for the server, we don't control it. It's actually run by the > >> >> campus wide it department we are just lab support for CS. I can > >> >> potentially get the server information but I need to know what you want > >> >> specifically as they're pretty paranoid about giving out information about > >> >> their servers. > >> > > >> > I would just want to know _what_ server platform you are running > >> > against. I know of at least one server bug that might explain what you > >> > are seeing, and I'd like to eliminate that as a possibility. > >> > > >> > Trond > >> > > >> >> Joshua Scoggins > >> >> > >> >> On Wed, Jun 22, 2011 at 11:30 AM, Trond Myklebust > >> >> <Trond.Myklebust@xxxxxxxxxx> wrote: > >> >> > On Wed, 2011-06-22 at 11:21 -0700, Joshua Scoggins wrote: > >> >> >> Hello, > >> >> >> > >> >> >> We are trying to update our linux images in our CS lab and have it a > >> >> >> bit of an issue. We are > >> >> >> using nfs to load user home folder. While testing the new image we > >> >> >> found that the nfs4 module will > >> >> >> crash when using firefox 3.6.17 for an extended period of time. Some > >> >> >> research via google yielded that > >> >> >> it's a potential race condition specific to nfs with krb auth with > >> >> >> newer kernels. Our old image doesn't have > >> >> >> this issue and it seems that its due to it running a far older kernel version. > >> >> >> > >> >> >> We have two images and both are having this problem. One is running > >> >> >> 2.6.39 and the other is 2.6.38. > >> >> >> Here is what dmesg spit out from the machine running 2.6.39 on one occasion: > >> >> >> > >> >> >> [ 678.632061] ------------[ cut here ]------------ > >> >> >> [ 678.632068] WARNING: at net/sunrpc/clnt.c:1567 call_decode+0xb2/0x69c() > >> >> >> [ 678.632070] Hardware name: OptiPlex 755 > >> >> >> [ 678.632072] Modules linked in: nvidia(P) scsi_wait_scan > >> >> >> [ 678.632078] Pid: 3882, comm: kworker/0:2 Tainted: P > >> >> >> 2.6.39-gentoo-r1 #1 > >> >> >> [ 678.632080] Call Trace: > >> >> >> [ 678.632086] [<ffffffff81035b20>] warn_slowpath_common+0x80/0x98 > >> >> >> [ 678.632091] [<ffffffff8117231e>] ? nfs4_xdr_dec_readdir+0xba/0xba > >> >> >> [ 678.632094] [<ffffffff81035b4d>] warn_slowpath_null+0x15/0x17 > >> >> >> [ 678.632097] [<ffffffff81426f48>] call_decode+0xb2/0x69c > >> >> >> [ 678.632101] [<ffffffff8142d2b5>] __rpc_execute+0x78/0x24b > >> >> >> [ 678.632104] [<ffffffff8142d4c9>] ? rpc_execute+0x41/0x41 > >> >> >> [ 678.632107] [<ffffffff8142d4d9>] rpc_async_schedule+0x10/0x12 > >> >> >> [ 678.632111] [<ffffffff8104a49d>] process_one_work+0x1d9/0x2e7 > >> >> >> [ 678.632114] [<ffffffff8104c402>] worker_thread+0x133/0x24f > >> >> >> [ 678.632118] [<ffffffff8104c2cf>] ? manage_workers+0x18d/0x18d > >> >> >> [ 678.632121] [<ffffffff8104f6a0>] kthread+0x7d/0x85 > >> >> >> [ 678.632125] [<ffffffff8145e314>] kernel_thread_helper+0x4/0x10 > >> >> >> [ 678.632128] [<ffffffff8104f623>] ? kthread_worker_fn+0x13a/0x13a > >> >> >> [ 678.632131] [<ffffffff8145e310>] ? gs_change+0xb/0xb > >> >> >> [ 678.632133] ---[ end trace 6bfae002a63e020e ]--- > > > > Looking at the code, there is only one way I can see for that warning to > > occur, and that is if we put the request back on the 'xprt->recv' list > > after it has already received a reply from the server. > > > > Can you reproduce the problem with the attached patch? > > > > Trond > > > > -- > > Trond Myklebust > > Linux NFS client maintainer > > > > NetApp > > Trond.Myklebust@xxxxxxxxxx > > www.netapp.com > > > > -- Trond Myklebust Linux NFS client maintainer NetApp Trond.Myklebust@xxxxxxxxxx www.netapp.com -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
