On Wed, Oct 12, 2011 at 3:05 AM, David Howells <dhowells@xxxxxxxxxx> wrote: > Mark Moseley <moseleymark@xxxxxxxxx> wrote: > >> > Hmmm... An object is being added to the object list twice. It may >> > indicate a free before an object is finished with. Do you have slab >> > debugging turned on? >> >> It's compiled in but not currently enabled. Should I do so? And >> anything I should be looking for in it? > > This raises another question: Which of CONFIG_SLAB/SLOB/SLUB are you actually > using? > > David > I had SLUB. I have CONFIG_SLUB_DEBUG but not CONFIG_SLUB_DEBUG_ON. I've recompiled with SLAB and CONFIG_DEBUG_SLAB enabled though: CONFIG_SLAB=y CONFIG_SLABINFO=y CONFIG_DEBUG_SLAB=y CONFIG_DEBUG_SLAB_LEAK=y Any flags anywhere that I need to set? I've also cleared out the fscache cache. When I initially booted into the 3.1.0-rc8 with SLAB, I was already at the cachefilesd.conf limit, space-wise, and it would crash almost immediately (basically as soon as load balancers started directing traffic to it again). I didn't have console, so I don't have the full traceback for these ones, but a little of the top actually made it to the logs: [ 117.654487] FS-Cache: Cache "mycache" added (type cachefiles) [ 117.654494] CacheFiles: File cache on sdb6 registered [ 184.943653] ------------[ cut here ]------------ [ 184.952933] kernel BUG at fs/fscache/object-list.c:83! [ 184.960676] invalid opcode: 0000 [#1] SMP [ 184.960676] CPU 1 [ 184.960676] Modules linked in: xfs ioatdma dca loop joydev evdev dcdbas psmouse serio_raw pcspkr i5000_edac edac_core i5k_amb shpchp pc i_hotplug sg sr_mod cdrom ehci_hcd uhci_hcd sd_mod crc_t10dif [last unloaded: scsi_wait_scan] [ 184.960676] [ 184.960676] Pid: 638, comm: kworker/u:2 Not tainted 3.1.0-rc8 #1 Dell Inc. PowerEdge 1950/0DT097 [ 184.960676] RIP: 0010:[<ffffffff8119d15c>] [<ffffffff8119d15c>] fscache_object_destroy+0x4c/0x50 [ 184.960676] RSP: 0000:ffff880224cebd90 EFLAGS: 00010246 [ 184.960676] RAX: 0000000000000011 RBX: ffff88021920a5e8 RCX: ffff8801d6b92a38 [ 184.960676] RDX: 0000000000000010 RSI: 000000000000006b RDI: ffffffff81c94b10 This was the 2nd one, after I'd panicked it starting up cachefilesd a couple of minutes earlier (which was also "kernel BUG at fs/fscache/object-list.c:83"), so I figured I should clear the cache. -- Linux-cachefs mailing list Linux-cachefs@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cachefs
