> Hi Yan Zheng, Eric Eastman > > Similar bug was reported in f2fs, btrfs, it does affect 4.4-rc4, the fixing > patch was merged into 4.4-rc5, dfd01f026058 ("sched/wait: Fix the signal > handling fix"). > > Related report & discussion was here: > https://lkml.org/lkml/2015/12/12/149 > > I'm not sure the current reported issue of ceph was related to that though, > but at least try testing with an upgraded or patched kernel could verify it. > :) > > Thanks, > >> -----Original Message----- >> From: ceph-devel-ow...@vger.kernel.org >> [mailto:ceph-devel-ow...@vger.kernel.org] On Behalf Of >> Yan, Zheng >> Sent: Friday, December 18, 2015 12:05 PM >> To: Eric Eastman >> Cc: Ceph Development >> Subject: Re: Issue with Ceph File System and LIO >> >> On Fri, Dec 18, 2015 at 3:49 AM, Eric Eastman >> <eric.east...@keepertech.com> wrote: >> > With cephfs.patch and cephfs1.patch applied and I am now seeing: >> > >> > [Thu Dec 17 14:27:59 2015] ------------[ cut here ]------------ >> > [Thu Dec 17 14:27:59 2015] WARNING: CPU: 0 PID: 3036 at >> > fs/ceph/addr.c:1171 ceph_write_begin+0xfb/0x120 [ceph]() >> > [Thu Dec 17 14:27:59 2015] Modules linked in: iscsi_target_mod ... >> > >> >> The page gets unlocked mystically. I still don't find any clue. Could >> you please try the new patch (not incremental patch). Besides, please >> enable CONFIG_DEBUG_VM when compiling the kernel. >> >> Thanks you very much >> Yan, Zheng > I have just installed the cephfs_new.patch and have set CONFIG_DEBUG_VM=y on a new 4.4rc4 kernel and restarted the ESXi iSCSI test to my Ceph File System gateway. I plan to let it run overnight and report the status tomorrow.
Let me know if I should move on to 4.4rc5 with or without patches and with or without CONFIG_DEBUG_VM=y Looking at the network traffic stats on my iSCSI gateway, with CONFIG_DEBUG_VM=y, throughput seems to be down by a factor of at least 10 compared to my last test without setting CONFIG_DEBUG_VM=y Regards, Eric -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html