Messages in this thread | | | Date | Wed, 11 Apr 2007 17:14:46 +0800 | From | "Zhao Forrest" <> | Subject | Re: Why kmem_cache_free occupy CPU for more than 10 seconds? |
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I enable CONFIG_DEBUG_SLAB, but don't get any extra debug messages related to slab. Is there other switch that I need to turn on?
Thanks, Forrest
BUG: soft lockup detected on CPU#6!
Call Trace: <IRQ> [<ffffffff800b3834>] softlockup_tick+0xdb/0xed [<ffffffff80093edf>] update_process_times+0x42/0x68 [<ffffffff80074897>] smp_local_timer_interrupt+0x23/0x47 [<ffffffff80074f59>] smp_apic_timer_interrupt+0x41/0x47 [<ffffffff8005c7c2>] apic_timer_interrupt+0x66/0x6c <EOI> [<ffffffff80043b09>] invalidate_mapping_pages+0xe1/0x15f [<ffffffff80043afa>] invalidate_mapping_pages+0xd2/0x15f [<ffffffff800d5bea>] kill_bdev+0xe/0x21 [<ffffffff800d6110>] __blkdev_put+0x4f/0x169 [<ffffffff80012785>] __fput+0xae/0x198 [<ffffffff80023ca6>] filp_close+0x5c/0x64 [<ffffffff80038e33>] put_files_struct+0x6c/0xc3 [<ffffffff8001543d>] do_exit+0x2d2/0x8b1 [<ffffffff80047932>] cpuset_exit+0x0/0x6c [<ffffffff8002b30f>] get_signal_to_deliver+0x427/0x456 [<ffffffff80059b9e>] do_notify_resume+0x9c/0x7a9 [<ffffffff8008776d>] default_wake_function+0x0/0xe [<ffffffff800b2b79>] audit_syscall_exit+0x2cd/0x2ec [<ffffffff8005be62>] int_signal+0x12/0x17
On 4/11/07, Pekka Enberg <penberg@cs.helsinki.fi> wrote: > On 4/11/07, Zhao Forrest <forrest.zhao@gmail.com> wrote: > > We're using RHEL5 with kernel version 2.6.18-8.el5. > > When doing a stress test on raw device for about 3-4 hours, we found > > the soft lockup message in dmesg. > > I know we're not reporting the bug on the latest kernel, but does any > > expert know if this is the known issue in old kernel? Or why > > kmem_cache_free occupy CPU for more than 10 seconds? > > Sounds like slab corruption. CONFIG_DEBUG_SLAB should tell you more. > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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