* [2.6.1-rc2-mm1][BUG] Badness in unblank_screen at drivers/char/vt.c:2793
@ 2004-01-08 23:45 Ramon Rey Vicente
2004-01-08 23:59 ` Andrew Morton
0 siblings, 1 reply; 4+ messages in thread
From: Ramon Rey Vicente @ 2004-01-08 23:45 UTC (permalink / raw)
To: linux-kernel@vger.kernel.org; +Cc: Andrew Morton
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Ramón Rey Vicente <ramon dot rey at hispalinux dot es>
jabber ID <rreylinux at jabber dot org>
GPG public key ID 0xBEBD71D5 -> http://pgp.escomposlinux.org/
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Jan 8 23:12:29 debian kernel: Badness in unblank_screen at drivers/char/vt.c:2793
Jan 8 23:12:29 debian kernel: Call Trace:
Jan 8 23:12:29 debian kernel: [unblank_screen+250/288] unblank_screen+0xfa/0x120
Jan 8 23:12:29 debian kernel: [bust_spinlocks+37/96] bust_spinlocks+0x25/0x60
Jan 8 23:12:29 debian kernel: [die+120/224] die+0x78/0xe0
Jan 8 23:12:29 debian kernel: [do_invalid_op+145/160] do_invalid_op+0x91/0xa0
Jan 8 23:12:29 debian kernel: [try_to_unmap_one+456/480] try_to_unmap_one+0x1c8/0x1e0
Jan 8 23:12:29 debian kernel: [slab_destroy+170/256] slab_destroy+0xaa/0x100
Jan 8 23:12:29 debian kernel: [free_pages_bulk+350/640] free_pages_bulk+0x15e/0x280
Jan 8 23:12:29 debian kernel: [free_hot_cold_page+224/256] free_hot_cold_page+0xe0/0x100
Jan 8 23:12:29 debian kernel: [error_code+47/64] error_code+0x2f/0x40
Jan 8 23:12:29 debian kernel: [try_to_unmap_one+456/480] try_to_unmap_one+0x1c8/0x1e0
Jan 8 23:12:29 debian kernel: [try_to_unmap+322/384] try_to_unmap+0x142/0x180
Jan 8 23:12:29 debian kernel: [shrink_list+579/1408] shrink_list+0x243/0x580
Jan 8 23:12:29 debian kernel: [do_timer+197/224] do_timer+0xc5/0xe0
Jan 8 23:12:29 debian kernel: [do_softirq+140/160] do_softirq+0x8c/0xa0
Jan 8 23:12:29 debian kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
Jan 8 23:12:29 debian kernel: [__pagevec_release+24/64] __pagevec_release+0x18/0x40
Jan 8 23:12:29 debian kernel: [shrink_cache+409/864] shrink_cache+0x199/0x360
Jan 8 23:12:29 debian kernel: [shrink_zone+107/128] shrink_zone+0x6b/0x80
Jan 8 23:12:29 debian kernel: [balance_pgdat+359/480] balance_pgdat+0x167/0x1e0
Jan 8 23:12:29 debian kernel: [kswapd+254/288] kswapd+0xfe/0x120
Jan 8 23:12:29 debian kernel: [autoremove_wake_function+0/64] autoremove_wake_function+0x0/0x40
Jan 8 23:12:29 debian kernel: [ret_from_fork+6/32] ret_from_fork+0x6/0x20
Jan 8 23:12:29 debian kernel: [autoremove_wake_function+0/64] autoremove_wake_function+0x0/0x40
Jan 8 23:12:29 debian kernel: [kswapd+0/288] kswapd+0x0/0x120
Jan 8 23:12:29 debian kernel: [kernel_thread_helper+5/36] kernel_thread_helper+0x5/0x24
Jan 8 23:12:29 debian kernel:
Jan 8 23:12:29 debian kernel: <6>note: kswapd0[8] exited with preempt_count 1
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [2.6.1-rc2-mm1][BUG] Badness in unblank_screen at drivers/char/vt.c:2793
2004-01-08 23:45 [2.6.1-rc2-mm1][BUG] Badness in unblank_screen at drivers/char/vt.c:2793 Ramon Rey Vicente
@ 2004-01-08 23:59 ` Andrew Morton
2004-01-09 0:10 ` Benjamin Herrenschmidt
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Morton @ 2004-01-08 23:59 UTC (permalink / raw)
To: ramon.rey; +Cc: ramon.rey, linux-kernel, Benjamin Herrenschmidt
Ramon Rey Vicente <ramon.rey@augcyl.org> wrote:
>
> ...
> Jan 8 23:12:29 debian kernel: Badness in unblank_screen at drivers/char/vt.c:2793
> Jan 8 23:12:29 debian kernel: Call Trace:
> Jan 8 23:12:29 debian kernel: [unblank_screen+250/288] unblank_screen+0xfa/0x120
> Jan 8 23:12:29 debian kernel: [bust_spinlocks+37/96] bust_spinlocks+0x25/0x60
> Jan 8 23:12:29 debian kernel: [die+120/224] die+0x78/0xe0
> Jan 8 23:12:29 debian kernel: [do_invalid_op+145/160] do_invalid_op+0x91/0xa0
> Jan 8 23:12:29 debian kernel: [try_to_unmap_one+456/480] try_to_unmap_one+0x1c8/0x1e0
> Jan 8 23:12:29 debian kernel: [slab_destroy+170/256] slab_destroy+0xaa/0x100
> Jan 8 23:12:29 debian kernel: [free_pages_bulk+350/640] free_pages_bulk+0x15e/0x280
> Jan 8 23:12:29 debian kernel: [free_hot_cold_page+224/256] free_hot_cold_page+0xe0/0x100
> Jan 8 23:12:29 debian kernel: [error_code+47/64] error_code+0x2f/0x40
> Jan 8 23:12:29 debian kernel: [try_to_unmap_one+456/480] try_to_unmap_one+0x1c8/0x1e0
> Jan 8 23:12:29 debian kernel: [try_to_unmap+322/384] try_to_unmap+0x142/0x180
> Jan 8 23:12:29 debian kernel: [shrink_list+579/1408] shrink_list+0x243/0x580
> Jan 8 23:12:29 debian kernel: [do_timer+197/224] do_timer+0xc5/0xe0
> Jan 8 23:12:29 debian kernel: [do_softirq+140/160] do_softirq+0x8c/0xa0
> Jan 8 23:12:29 debian kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
> Jan 8 23:12:29 debian kernel: [__pagevec_release+24/64] __pagevec_release+0x18/0x40
> Jan 8 23:12:29 debian kernel: [shrink_cache+409/864] shrink_cache+0x199/0x360
> Jan 8 23:12:29 debian kernel: [shrink_zone+107/128] shrink_zone+0x6b/0x80
> Jan 8 23:12:29 debian kernel: [balance_pgdat+359/480] balance_pgdat+0x167/0x1e0
> Jan 8 23:12:29 debian kernel: [kswapd+254/288] kswapd+0xfe/0x120
> Jan 8 23:12:29 debian kernel: [autoremove_wake_function+0/64] autoremove_wake_function+0x0/0x40
> Jan 8 23:12:29 debian kernel: [ret_from_fork+6/32] ret_from_fork+0x6/0x20
> Jan 8 23:12:29 debian kernel: [autoremove_wake_function+0/64] autoremove_wake_function+0x0/0x40
> Jan 8 23:12:29 debian kernel: [kswapd+0/288] kswapd+0x0/0x120
> Jan 8 23:12:29 debian kernel: [kernel_thread_helper+5/36] kernel_thread_helper+0x5/0x24
> Jan 8 23:12:29 debian kernel:
> Jan 8 23:12:29 debian kernel: <6>note: kswapd0[8] exited with preempt_count 1
>
Ben, your debug stuff tripped up when we were oopsing. bust_spinlocks()
calls unblank_screen() without console_sem. I'll change it to
WARN_ON(!is_console_locked() && !oops_in_progress);
(Weren't you going to update that patch anyway?)
As for the oops itself: 2.6.1-rc2-mm1 VM is kaput, sorry. It works OK here
without the fremap changes.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [2.6.1-rc2-mm1][BUG] Badness in unblank_screen at drivers/char/vt.c:2793
2004-01-08 23:59 ` Andrew Morton
@ 2004-01-09 0:10 ` Benjamin Herrenschmidt
2004-01-09 0:18 ` Andrew Morton
0 siblings, 1 reply; 4+ messages in thread
From: Benjamin Herrenschmidt @ 2004-01-09 0:10 UTC (permalink / raw)
To: Andrew Morton; +Cc: ramon.rey, ramon.rey, Linux Kernel list
> Ben, your debug stuff tripped up when we were oopsing. bust_spinlocks()
> calls unblank_screen() without console_sem. I'll change it to
>
> WARN_ON(!is_console_locked() && !oops_in_progress);
>
> (Weren't you going to update that patch anyway?)
I don't have an update ready at the moment, nothing critical need
updating and I was waiting to see if the WARN_ON would catch some
stuffs :)
It's probably worth adding a WARN_CONSOLE_UNLOCKED() macro that
does the above rather than fixing all the WARN_ON's don't you
think ? If yes, then I'll do a new patch.
> As for the oops itself: 2.6.1-rc2-mm1 VM is kaput, sorry. It works OK here
> without the fremap changes.
Ok.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [2.6.1-rc2-mm1][BUG] Badness in unblank_screen at drivers/char/vt.c:2793
2004-01-09 0:10 ` Benjamin Herrenschmidt
@ 2004-01-09 0:18 ` Andrew Morton
0 siblings, 0 replies; 4+ messages in thread
From: Andrew Morton @ 2004-01-09 0:18 UTC (permalink / raw)
To: Benjamin Herrenschmidt; +Cc: ramon.rey, ramon.rey, linux-kernel
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
>
> I don't have an update ready at the moment, nothing critical need
> updating and I was waiting to see if the WARN_ON would catch some
> stuffs :)
>
> It's probably worth adding a WARN_CONSOLE_UNLOCKED() macro that
> does the above rather than fixing all the WARN_ON's don't you
> think ? If yes, then I'll do a new patch.
I wouldn't bust a gut over it - this is the only code path which I've seen
generate the warning (famous last words).
^ permalink raw reply [flat|nested] 4+ messages in thread
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2004-01-08 23:45 [2.6.1-rc2-mm1][BUG] Badness in unblank_screen at drivers/char/vt.c:2793 Ramon Rey Vicente
2004-01-08 23:59 ` Andrew Morton
2004-01-09 0:10 ` Benjamin Herrenschmidt
2004-01-09 0:18 ` Andrew Morton
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