This was a simple s/igrab/ihold/ fix. See 283a85dc6e670083adb1e5437bd93d163f4f801a in the for-linus branch of ceph-client.git. I'll push to Linus in the next few days. Thanks! sage On Sun, 17 Apr 2011, Maciej Rutecki wrote: > I created a Bugzilla entry at > https://bugzilla.kernel.org/show_bug.cgi?id=33452 > for your bug report, please add your address to the CC list in there, thanks! > > On piÿÿtek, 15 kwietnia 2011 o 19:00:58 Jim Schutt wrote: > > Hi, > > > > This command is hanging on 2.6.39-rc3, where /mnt/ceph is > > a ceph file system: > > dd conv=fdatasync if=/dev/zero of=/mnt/ceph/zero.`hostname -s` bs=4k > > count=4k > > > > It works on 2.6.38. As of commit e38f5b745075 in Linus' > > tree it still doesn't work. > > > > I bisected this to: > > > > 250df6ed274d767da844a5d9f05720b804240197 is the first bad commit > > commit 250df6ed274d767da844a5d9f05720b804240197 > > Author: Dave Chinner <dchinner@xxxxxxxxxx> > > Date: Tue Mar 22 22:23:36 2011 +1100 > > > > fs: protect inode->i_state with inode->i_lock > > > > In the early stages of the bisection, bad commits would show this > > in dmesg: > > > > [ 137.004963] libceph: loaded (mon/osd proto 15/24, osdmap 5/6 5/6) > > [ 137.056431] ceph: loaded (mds proto 32) > > [ 137.063213] libceph: client4283 fsid > > 950217ad-499e-eab1-03f7-f6d245f42751 [ 137.063826] libceph: mon0 > > 172.17.40.34:6789 session established [ 219.658002] INFO: rcu_sched_state > > detected stall on CPU 0 (t=60000 jiffies) > > > > For the last couple of bad commits during the bisection, the > > client box would just hang and I'd have to power-cycle it. > > > > When I reboot/remount after a hang, the file I was trying > > to write is there, with size and date both zero: > > > > # ls -l --time-style=+%s /mnt/ceph/zero.an1024 > > -rw-r--r-- 1 jaschut jaschut 0 0 /mnt/ceph/zero.an1024 > > > > strace suggests it's the write that hangs: > > > > close(3) = 0 > > close(0) = 0 > > open("/dev/zero", O_RDONLY) = 0 > > lseek(0, 0, SEEK_CUR) = 0 > > close(1) = 0 > > open("/mnt/ceph/zero.an1024", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 1 > > rt_sigaction(SIGUSR1, NULL, {SIG_DFL, [], 0}, 8) = 0 > > rt_sigaction(SIGINT, NULL, {SIG_DFL, [], 0}, 8) = 0 > > rt_sigaction(SIGUSR1, {0x401a20, [INT USR1], SA_RESTORER, 0x7f3a97f292d0}, > > NULL, 8) = 0 rt_sigaction(SIGINT, {0x401a10, [INT USR1], > > SA_RESTORER|SA_NODEFER|SA_RESETHAND, 0x7f3a97f292d0}, NULL, 8) = 0 > > clock_gettime(CLOCK_MONOTONIC, {216, 671807533}) = 0 > > read(0, > > "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., > > 4096) = 4096 write(1, > > "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., > > 4096 > > > > Let me know if I can do anything else to help sort this out. > > > > -- Jim > > > > (Please Cc: me as I am not subscribed to lkml.) > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > -- > Maciej Rutecki > http://www.maciek.unixy.pl > -- > 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 > >
