Messages in this thread | | | Date | Wed, 9 Apr 2014 07:35:56 -0600 | From | Jens Axboe <> | Subject | Re: [BUG] kernel BUG at /.../block/cfq-iosched.c:3145! |
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On 04/08/2014 10:44 PM, Benjamin Herrenschmidt wrote: > Hi folks ! > > While testing a branch of fixes before I send it to Linus, which > happens to be based on 18a1a7a1d862ae0794a0179473d08a414dd49234, > I hit this: > > kernel BUG at /home/benh/linux-powerpc-test/block/cfq-iosched.c:3145! > cpu 0x3c: Vector: 700 (Program Check) at [c000003ca69bb190] > pc: c00000000033b05c: .cfq_dispatch_requests+0x90/0x99c > lr: c00000000033b038: .cfq_dispatch_requests+0x6c/0x99c > sp: c000003ca69bb410 > msr: 9000000000029032 > current = 0xc000003ca63d32a0 > paca = 0xc00000000ffef000 softe: 0 irq_happened: 0x01 > pid = 3487, comm = smartd > kernel BUG at /home/benh/linux-powerpc-test/block/cfq-iosched.c:3145! > enter ? for help > [c000003ca69bb4c0] c00000000032000c .elv_drain_elevator+0x70/0xc8 > [c000003ca69bb540] c000000000320140 .__elv_add_request+0xdc/0x27c > [c000003ca69bb5e0] c0000000003286f8 .blk_execute_rq_nowait+0xc0/0xf8 > [c000003ca69bb670] c0000000003287ec .blk_execute_rq+0xbc/0xe8 > [c000003ca69bb810] c000000000332350 .sg_io+0x218/0x39c > [c000003ca69bb930] c000000000332c3c .scsi_cmd_ioctl+0x270/0x4ac > [c000003ca69bba70] c0000000005d559c .sd_ioctl+0xa4/0xd8 > [c000003ca69bbb20] c00000000032eb1c .__blkdev_driver_ioctl+0x34/0x54 > [c000003ca69bbb90] c00000000032f83c .blkdev_ioctl+0x7b8/0x850 > [c000003ca69bbc40] c00000000018d6e0 .block_ioctl+0x4c/0x60 > [c000003ca69bbcb0] c0000000001691cc .do_vfs_ioctl+0x5cc/0x670 > [c000003ca69bbd90] c0000000001692b4 .SyS_ioctl+0x44/0x70 > [c000003ca69bbe30] c00000000000a024 syscall_exit+0x0/0x98 > --- Exception: c00 (System Call) at 00003fffb5240ee0 > > The storage driver is our usual IBM "IPR". > > Is that a known issue ?
Nope, that's not a known issue. This must be related to the FIFO changes... How reproducible is this?
-- Jens Axboe
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