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Bug #139
closedBUG ceph_dentry_info: Objects remaining on kmem_cache_close()
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Description
After unmounting my Ceph filesystem and removing my kernel module i got the following message:
[ 167.227965] ceph: loaded (mon/mds/osd proto 15/32/24, osdmap 5/5 5/5) [ 167.236804] ceph: client4098 fsid 94b87913-0b1c-9aba-5717-232aea46dc59 [ 167.237265] ceph: mon0 192.168.6.209:6789 session established [ 239.958014] ============================================================================= [ 239.958112] BUG ceph_dentry_info: Objects remaining on kmem_cache_close() [ 239.958195] ----------------------------------------------------------------------------- [ 239.958196] [ 239.958343] INFO: Slab 0xffffea0000dec228 objects=51 used=1 fp=0xffff88003fa53fa0 flags=0x100000000000080 [ 239.958441] Pid: 1335, comm: rmmod Not tainted 2.6.34-020634-generic #020634 [ 239.958444] Call Trace: [ 239.958457] [<ffffffff8112eea2>] slab_err+0xb2/0xe0 [ 239.958466] [<ffffffff81009928>] ? __switch_to+0x188/0x2e0 [ 239.958473] [<ffffffff81051af6>] ? finish_task_switch+0x66/0xd0 [ 239.958478] [<ffffffff811320c0>] ? flush_cpu_slab+0x0/0x60 [ 239.958484] [<ffffffff81094de8>] ? smp_call_function_single+0x148/0x150 [ 239.958488] [<ffffffff811320c0>] ? flush_cpu_slab+0x0/0x60 [ 239.958492] [<ffffffff811305b9>] list_slab_objects+0xb9/0x1d0 [ 239.958497] [<ffffffff81136367>] ? pcpu_chunk_slot+0x27/0x30 [ 239.958501] [<ffffffff81131fa9>] free_partial+0xa9/0xd0 [ 239.958505] [<ffffffff811327de>] kmem_cache_destroy+0xae/0x160 [ 239.958520] [<ffffffffa01c0e4d>] destroy_caches+0x2d/0x40 [ceph] [ 239.958528] [<ffffffffa01e962b>] exit_ceph+0x1f/0x2b [ceph] [ 239.958534] [<ffffffff810988c6>] sys_delete_module+0x166/0x1f0 [ 239.958539] [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b [ 239.958550] INFO: Object 0xffff88003fa53000 @offset=0 [ 239.958628] SLUB ceph_dentry_info: kmem_cache_destroy called for cache that still has objects. [ 239.958719] Pid: 1335, comm: rmmod Not tainted 2.6.34-020634-generic #020634 [ 239.958721] Call Trace: [ 239.958725] [<ffffffff81132878>] kmem_cache_destroy+0x148/0x160 [ 239.958732] [<ffffffffa01c0e4d>] destroy_caches+0x2d/0x40 [ceph] [ 239.958740] [<ffffffffa01e962b>] exit_ceph+0x1f/0x2b [ceph] [ 239.958744] [<ffffffff810988c6>] sys_delete_module+0x166/0x1f0 [ 239.958749] [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
I'm running the latest "unstable" of the ceph-client with a 2.6.34 final kernel.
On my Ceph filesystem i was unpacking the Linux kernel and removing it again.
It seems there is some memory which isn't cleaned up properly after a unmount?
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