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    SubjectRe: kernel BUG at mm/slqb.c:1411!
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    On Wed, 2009-05-13 at 16:42 +0900, KOSAKI Motohiro wrote:
    > Todays test (repeated large file copy) hit kernel panic. mm/slqb.c:1411! mean

    Can you post your .config, please? I assume this is with CONFIG_NUMA?

    >
    > ----------------------------------------------------------------
    > static noinline void *__slab_alloc_page(struct kmem_cache *s,
    > gfp_t gfpflags, int node)
    > {
    > (snip)
    >
    > } else {
    > #ifdef CONFIG_NUMA
    > struct kmem_cache_node *n;
    >
    > n = s->node_slab[slqb_page_to_nid(page)];
    > l = &n->list;
    > page->list = l;
    >
    > spin_lock(&n->list_lock);
    > l->nr_slabs++;
    > l->nr_partial++;
    > list_add(&page->lru, &l->partial);
    > slqb_stat_inc(l, ALLOC);
    > slqb_stat_inc(l, ALLOC_SLAB_NEW);
    > object = __cache_list_get_page(s, l);
    > spin_unlock(&n->list_lock);
    > #endif
    > }
    > VM_BUG_ON(!object); // here
    > return object;
    > }
    > ----------------------------------------------------------------
    >
    >
    > Who have any suggestions?
    >
    >
    >
    > -------------------------------------------------------------------
    > kernel BUG at mm/slqb.c:1411!
    > pdflush[324]: bugcheck! 0 [1]
    > Modules linked in: binfmt_misc nls_iso8859_1 nls_cp437 dm_multipath scsi_dh fan sg processor button container thermal e100 mii dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod lpfc mptspi mptscsih mptbase ehci_hcd ohci_hcd uhci_hcd usbcore
    >
    > Pid: 324, CPU 1, comm: pdflush
    > psr : 00001010085a2010 ifs : 8000000000000916 ip : [<a0000001001bb960>] Not tainted (2.6.30-rc4-mm1-g384655e-dirty)
    > ip is at __slab_alloc_page+0x800/0x9e0
    > unat: 0000000000000000 pfs : 0000000000000916 rsc : 0000000000000003
    > rnat: 0000000000000001 bsps: a000000100d5b880 pr : 005599aa55559599
    > ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f
    > csd : 0000000000000000 ssd : 0000000000000000
    > b0 : a0000001001bb960 b6 : a0000001005a78e0 b7 : a00000010048bac0
    > f6 : 1003e000005cef074293b f7 : 1003e0000000000000190
    > f8 : 1003e000005cef07427ab f9 : 1003e0000000000000001
    > f10 : 1003e0000000000000100 f11 : 1003e0000000000000100
    > r1 : a000000100f52d40 r2 : a000000100d263a0 r3 : a000000100d53708
    > r8 : 0000000000000021 r9 : 0000000000000001 r10 : e000000001110000
    > r11 : ffffffffffff0420 r12 : e0000040c1ccfc20 r13 : e0000040c1cc0000
    > r14 : a000000100d263b8 r15 : e00001600b91fe18 r16 : ffffffffffff5538
    > r17 : 00000000dead4ead r18 : a000000100cd222c r19 : a000000100d5b850
    > r20 : a0000001005a78e0 r21 : a000000101144ae0 r22 : 0000000000099a63
    > r23 : 00000000000fffff r24 : 0000000000100000 r25 : a0000001009e7a68
    > r26 : a00000010048bb60 r27 : 0000000000000100 r28 : 0000000000000001
    > r29 : e0000040c1cc0de4 r30 : a00000010048bac0 r31 : 0000000000000000
    >
    > Call Trace:
    > [<a0000001000179c0>] show_stack+0x80/0xa0
    > sp=e0000040c1ccf7f0 bsp=e0000040c1cc1730
    > [<a0000001000182d0>] show_regs+0x890/0x8c0
    > sp=e0000040c1ccf9c0 bsp=e0000040c1cc16d8
    > [<a000000100040b50>] die+0x1b0/0x2e0
    > sp=e0000040c1ccf9c0 bsp=e0000040c1cc1690
    > [<a000000100040cd0>] die_if_kernel+0x50/0x80
    > sp=e0000040c1ccf9c0 bsp=e0000040c1cc1660
    > [<a0000001007cc5f0>] ia64_bad_break+0x4b0/0x700
    > sp=e0000040c1ccf9c0 bsp=e0000040c1cc1638
    > [<a00000010000c980>] ia64_native_leave_kernel+0x0/0x270
    > sp=e0000040c1ccfa50 bsp=e0000040c1cc1638
    > [<a0000001001bb960>] __slab_alloc_page+0x800/0x9e0
    > sp=e0000040c1ccfc20 bsp=e0000040c1cc1580
    > [<a0000001001bd570>] kmem_cache_alloc+0x510/0x700
    > sp=e0000040c1ccfc20 bsp=e0000040c1cc14f0
    > [<a000000100149ad0>] mempool_alloc_slab+0x30/0x60
    > sp=e0000040c1ccfc20 bsp=e0000040c1cc14c8
    > [<a00000010014a1a0>] mempool_alloc+0xc0/0x360
    > sp=e0000040c1ccfc20 bsp=e0000040c1cc1440
    > [<a00000010022f4d0>] bio_alloc_bioset+0x50/0x240
    > sp=e0000040c1ccfc50 bsp=e0000040c1cc13f0
    > [<a00000010022f790>] bio_alloc+0x30/0x80
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc13c8
    > [<a000000100220a90>] submit_bh+0x130/0x3e0
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc1398
    > [<a000000100226d90>] __block_write_full_page+0x510/0xbc0
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc1310
    > [<a0000001002275f0>] block_write_full_page_endio+0x1b0/0x220
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc12d0
    > [<a000000100227690>] block_write_full_page+0x30/0x60
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc12a0
    > [<a0000001002a9210>] ext3_writeback_writepage+0x190/0x380
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc1260
    > [<a0000001001566b0>] __writepage+0x50/0x1a0
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc1230
    > [<a000000100157370>] write_cache_pages+0x530/0x940
    > sp=e0000040c1ccfc60 bsp=e0000040c1cc1140
    > [<a0000001001577e0>] generic_writepages+0x60/0x80
    > sp=e0000040c1ccfcf0 bsp=e0000040c1cc1118
    > [<a000000100157910>] do_writepages+0x110/0x140
    > sp=e0000040c1ccfcf0 bsp=e0000040c1cc10e8
    > [<a000000100214c20>] __writeback_single_inode+0x160/0x9a0
    > sp=e0000040c1ccfcf0 bsp=e0000040c1cc1088
    > [<a000000100215d40>] generic_sync_sb_inodes+0x3c0/0xa00
    > sp=e0000040c1ccfd30 bsp=e0000040c1cc1018
    > [<a000000100216420>] sync_sb_inodes+0xa0/0xc0
    > sp=e0000040c1ccfd30 bsp=e0000040c1cc0fe8
    > [<a000000100216620>] writeback_inodes+0x1e0/0x280
    > sp=e0000040c1ccfd30 bsp=e0000040c1cc0f98
    > [<a000000100159ba0>] background_writeout+0x160/0x240
    > sp=e0000040c1ccfd30 bsp=e0000040c1cc0f30
    > [<a00000010015b010>] pdflush+0x290/0x500
    > sp=e0000040c1ccfd80 bsp=e0000040c1cc0ec0
    > [<a0000001000df800>] kthread+0x100/0x140
    > sp=e0000040c1ccfdf0 bsp=e0000040c1cc0e88
    > [<a000000100015970>] kernel_thread_helper+0xd0/0x100
    > sp=e0000040c1ccfe30 bsp=e0000040c1cc0e60
    > [<a00000010000a580>] start_kernel_thread+0x20/0x40
    > sp=e0000040c1ccfe30 bsp=e0000040c1cc0e60
    > Disabling lock debugging due to kernel taint
    > Kernel panic - not syncing: Fatal exception
    > Rebooting in 1 seconds..
    >
    >
    >
    >
    >



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