On Wed, May 28, 2014 at 10:37:51AM +0300, Mika Westerberg wrote: > I sent you the whole log privately so that I don't spam everyone. > > Summary is here: > > May 28 10:24:23 lahna kernel: scsi 14:0:0:0: Direct-Access JetFlash Transcend 4GB 8.07 PQ: 0 ANSI: 4 > May 28 10:24:23 lahna kernel: sd 14:0:0:0: Attached scsi generic sg4 type 0 > May 28 10:24:23 lahna kernel: sd 14:0:0:0: [sdc] 7864320 512-byte logical blocks: (4.02 GB/3.75 GiB) > May 28 10:24:23 lahna kernel: sd 14:0:0:0: [sdc] Write Protect is off > May 28 10:24:23 lahna kernel: sd 14:0:0:0: [sdc] Mode Sense: 23 00 00 00 > May 28 10:24:23 lahna kernel: sd 14:0:0:0: [sdc] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA > May 28 10:24:23 lahna kernel: sdc: sdc1 > May 28 10:24:23 lahna kernel: sd 14:0:0:0: [sdc] Attached SCSI removable disk > > Here I detached the USB stick: > > May 28 10:24:32 lahna kernel: usb 3-10.4: USB disconnect, device number 6 > May 28 10:24:32 lahna kernel: check_submounts_and_drop[/dev/block/8:33]; CPU 4 PID 576 [systemd-udevd] > May 28 10:24:32 lahna kernel: dput[/dev/block/8:33]; CPU 4 PID 576 [systemd-udevd] > May 28 10:24:32 lahna kernel: check_submounts_and_drop[3-10/3-10.4/3-10.4:1.0/host14]; CPU 1 PID 1683 [systemd-udevd] > May 28 10:24:32 lahna kernel: shrink[3-10.4:1.0/host14/target14:0:0/subsystem]; CPU 1 PID 1683 [systemd-udevd] > May 28 10:24:32 lahna kernel: shrink[host14/target14:0:0/14:0:0:0/rev]; CPU 1 PID 1683 [systemd-udevd] > May 28 10:24:32 lahna kernel: shrink[host14/target14:0:0/14:0:0:0/vendor]; CPU 1 PID 1683 [systemd-udevd] > May 28 10:24:32 lahna kernel: shrink[host14/target14:0:0/14:0:0:0/model]; CPU 1 PID 1683 [systemd-udevd] > May 28 10:24:32 lahna kernel: check_submounts_and_drop[/dev/block/8:32]; CPU 4 PID 576 [systemd-udevd] > ... > May 28 10:24:32 lahna kernel: check_submounts_and_drop[0000:00:14.0/usb3/3-10/3-10.4]; CPU 6 PID 1684 [systemd-udevd] > May 28 10:24:32 lahna kernel: check_submounts_and_drop[0000:00:14.0/usb3/3-10/3-10.4]; CPU 7 PID 1685 [systemd-udevd] > May 28 10:24:32 lahna kernel: shrink[usb3/3-10/3-10.4/ltm_capable]; CPU 7 PID 1685 [systemd-udevd] > May 28 10:24:32 lahna kernel: A ... Hmm... As it is, we have d_walk() trying _very_ hard in those situations. Could you add that on top of the previous and see if livelock changes? diff --git a/fs/dcache.c b/fs/dcache.c index 42ae01e..4ce58d3 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1209,7 +1209,7 @@ static enum d_walk_ret select_collect(void *_data, struct dentry *dentry) * ensures forward progress). We'll be coming back to find * the rest. */ - if (!list_empty(&data->dispose)) + if (data->found) ret = need_resched() ? D_WALK_QUIT : D_WALK_NORETRY; out: return ret; -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
