linux-kernel - Re: WARNING (1) at .../arch/i386/mm/highmem.c:49 [Was: 2.6.20-rc1-mm1]

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Date:	Fri, 15 Dec 2006 16:16:48 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ntfs-dev@...ts.sourceforge.net,
	Anton Altaparmakov <aia21@...tab.net>
Subject: Re: WARNING (1) at .../arch/i386/mm/highmem.c:49 [Was:
 2.6.20-rc1-mm1]

On Sat, 16 Dec 2006 00:25:43 +0059
Jiri Slaby <jirislaby@...il.com> wrote:

> Andrew Morton wrote:
> > Temporarily at
> > 
> > 	http://userweb.kernel.org/~akpm/2.6.20-rc1-mm1/
> > 
> > Will appear later at
> > 
> > 	ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc1/2.6.20-rc1-mm1/
> 
> Ok, after fixing sata_promise, I got this 7 times:
> [   30.957539] WARNING (1) at /home/l/latest/xxx/arch/i386/mm/highmem.c:49
> kmap_atomic()
> [   30.957642]  [<c0103f1b>] show_trace_log_lvl+0x1a/0x30
> [   30.957748]  [<c01045d5>] show_trace+0x12/0x14
> [   30.957846]  [<c010465c>] dump_stack+0x16/0x18
> [   30.957944]  [<c011a20b>] kmap_atomic+0x1f8/0x20d
> [   30.958041]  [<c01b1921>] ntfs_end_buffer_async_read+0x191/0x2ed
> [   30.958142]  [<c0182f3a>] end_bio_bh_io_sync+0x26/0x3f
> [   30.958241]  [<c01849d4>] bio_endio+0x37/0x62
> [   30.958338]  [<c01cc500>] __end_that_request_first+0x224/0x445
> [   30.958441]  [<c01cc729>] end_that_request_chunk+0x8/0xa
> [   30.958541]  [<c025fe3a>] scsi_end_request+0x1f/0xc6
> [   30.958640]  [<c02600c8>] scsi_io_completion+0x1a1/0x336
> [   30.958738]  [<c026578d>] sd_rw_intr+0x23/0x1ab
> [   30.958835]  [<c025c38d>] scsi_finish_command+0x42/0x47
> [   30.958935]  [<c02607f8>] scsi_softirq_done+0x64/0xca
> [   30.959032]  [<c01ce2c9>] blk_done_softirq+0x54/0x62
> [   30.959132]  [<c0126a25>] __do_softirq+0x75/0xde
> [   30.959229]  [<c0126ac9>] do_softirq+0x3b/0x3d
> [   30.959326]  [<c0126d5e>] irq_exit+0x3b/0x3e
> [   30.959423]  [<c0105746>] do_IRQ+0x45/0x7f
> [   30.959540]  [<c010397f>] common_interrupt+0x23/0x28
> [   30.959713]  [<c010138b>] cpu_idle+0x7c/0xba
> [   30.959809]  [<c01006dc>] rest_init+0x23/0x37
> [   30.959951]  [<c050a7df>] start_kernel+0x337/0x3e8

bah, that's a false positive.  I'll teach kmap_atomic-debugging.patch about
KM_BIO_SRC_IRQ and KM_BIO_DST_IRQ, thanks.

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