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Message-Id: <1193478004.7496.21.camel@Homer.simpson.net> Date: Sat, 27 Oct 2007 11:40:04 +0200 From: Mike Galbraith <efault@....de> To: Steven Rostedt <rostedt@...dmis.org> Cc: LKML <linux-kernel@...r.kernel.org>, RT <linux-rt-users@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [2.6.23-rt3] NMI watchdog trace of deadlock On Sat, 2007-10-27 at 07:21 +0200, Mike Galbraith wrote: > Greetings, > > For quite a while now, RT kernels have been locking up on me > occasionally while my back is turned. Yesterday, the little bugger > finally pounced while my serial console box was up and waiting. > > [10138.162953] WARNING: at arch/i386/kernel/smp.c:581 native_smp_call_function_mask() > [10138.170583] [<c01051da>] show_trace_log_lvl+0x1a/0x30 > [10138.175796] [<c0105de3>] show_trace+0x12/0x14 > [10138.180291] [<c0105dfb>] dump_stack+0x16/0x18 > [10138.184769] [<c011609f>] native_smp_call_function_mask+0x138/0x13d > [10138.191117] [<c0117606>] smp_call_function+0x1e/0x24 > [10138.196210] [<c012f85c>] on_each_cpu+0x25/0x50 > [10138.200807] [<c0115c74>] flush_tlb_all+0x1e/0x20 > [10138.205553] [<c016caaf>] kmap_high+0x1b6/0x417 > [10138.210118] [<c011ec88>] kmap+0x4d/0x4f > [10138.214102] [<c026a9d8>] ntfs_end_buffer_async_read+0x228/0x2f9 > [10138.220163] [<c01a0e9e>] end_bio_bh_io_sync+0x26/0x3f > [10138.225352] [<c01a2b09>] bio_endio+0x42/0x6d > [10138.229769] [<c02c2a08>] __end_that_request_first+0x115/0x4ac > [10138.235682] [<c02c2da7>] end_that_request_chunk+0x8/0xa > [10138.241052] [<c0365943>] ide_end_request+0x55/0x10a > [10138.246058] [<c036dae3>] ide_dma_intr+0x6f/0xac > [10138.250727] [<c0366d83>] ide_intr+0x93/0x1e0 > [10138.255125] [<c015afb4>] handle_IRQ_event+0x5c/0xc9 > [10138.260113] [<c015bcfd>] do_irqd+0x1fc/0x2ef > [10138.264514] [<c013cdb2>] kthread+0x39/0x5b > [10138.268740] [<c0104e33>] kernel_thread_helper+0x7/0x14 > [10138.274006] ======================= (box may recommend that i go figure out why interrupts are disabled instead;) --- ./fs/ntfs/aops.c.org 2007-10-27 10:16:40.000000000 +0200 +++ ./fs/ntfs/aops.c 2007-10-27 10:30:52.000000000 +0200 @@ -140,6 +140,7 @@ static void ntfs_end_buffer_async_read(s /* Should have been verified before we got here... */ BUG_ON(!recs); local_irq_save(flags); + local_irq_enable(); kaddr = kmap_atomic(page, KM_BIO_SRC_IRQ); for (i = 0; i < recs; i++) post_read_mst_fixup((NTFS_RECORD*)(kaddr + - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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