From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
RT <linux-rt-users@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [2.6.23-rt3] NMI watchdog trace of deadlock
Date: Sat, 27 Oct 2007 19:15:42 +1000 [thread overview]
Message-ID: <200710271915.42363.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <1193462494.25330.7.camel@Homer.simpson.net>
On Saturday 27 October 2007 15:21, 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
Looks like ntfs is kmap()ing from interrupt context. Should
be using kmap_atomic instead, I think.
But the ntfs code I have seems to do just that...
next prev parent reply other threads:[~2007-10-27 9:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-24 17:07 2.6.23-rt2 Steven Rostedt
2007-10-27 5:21 ` [2.6.23-rt3] NMI watchdog trace of deadlock Mike Galbraith
2007-10-27 9:15 ` Nick Piggin [this message]
2007-10-27 9:43 ` Mike Galbraith
2007-10-27 9:44 ` Ingo Molnar
2007-10-27 10:12 ` Jaswinder Singh
2007-10-27 13:22 ` Steven Rostedt
2007-10-27 10:17 ` Mike Galbraith
2007-10-27 13:16 ` Ingo Molnar
2007-10-27 14:29 ` Steven Rostedt
2007-10-27 9:40 ` Mike Galbraith
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