On Fri, May 2, 2014 at 6:09 PM, Alex Elder <elder@xxxxxxxx> wrote: > On 05/02/2014 11:04 AM, Hannes Landeholm wrote: >> >> Hi, I just had a rbd unmap operation deadlock on my development >> machine. The file system was in heavy use before I did it but I have a >> sync barrier before the umount and unmap so it shouldn't matter. The >> rbd unmap hanged in "State: D (disk sleep)". I have so far waited >> over 10 minutes, this normally takes < 1 sec. >> >> Here is the /proc/pid/stack output: >> >> [<ffffffff8107e23a>] flush_workqueue+0x11a/0x5a0 >> [<ffffffffa031b415>] ceph_msgr_flush+0x15/0x20 [libceph] >> [<ffffffffa03219c6>] ceph_monc_stop+0x46/0x120 [libceph] >> [<ffffffffa031af28>] ceph_destroy_client+0x38/0xa0 [libceph] >> [<ffffffffa0359b88>] rbd_client_release+0x68/0xa0 [rbd] >> [<ffffffffa0359bec>] rbd_put_client+0x2c/0x30 [rbd] >> [<ffffffffa0359c06>] rbd_dev_destroy+0x16/0x30 [rbd] >> [<ffffffffa0359c77>] rbd_dev_image_release+0x57/0x60 [rbd] >> [<ffffffffa035adc7>] do_rbd_remove.isra.25+0x167/0x1b0 [rbd] >> [<ffffffffa035ae54>] rbd_remove+0x24/0x30 [rbd] >> [<ffffffff8136ea67>] bus_attr_store+0x27/0x30 >> [<ffffffff81218d4d>] sysfs_kf_write+0x3d/0x50 >> [<ffffffff8121c982>] kernfs_fop_write+0xd2/0x140 >> [<ffffffff811a67fa>] vfs_write+0xba/0x1e0 >> [<ffffffff811a7206>] SyS_write+0x46/0xc0 >> [<ffffffff814e66e9>] system_call_fastpath+0x16/0x1b >> [<ffffffffffffffff>] 0xffffffffffffffff >> >> Unfortunately our rbd.ko does not appear to have any debug symbols. >> >> Other unmaps also hanged after this that have the same parent. (We are >> using layering.) Linux version: 3.14.1. > > Is this "stock" 3.14.1? Can you provide the full output of "uname -a"? > And if possible, either /proc/config.gz or /boot/config-3.13.1 (or > whichever file seems to match the currently-running kernel)? Yes, this is a "stock" Arch 3.14.1 kernel with no custom patches. uname: Linux localhost 3.14.1-1-js #1 SMP PREEMPT Tue Apr 15 17:59:05 CEST 2014 x86_64 GNU/Linux config: http://pastebin.com/unZCzXZZ Thank you for your time, -- Hannes Landeholm -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
