From: alexander.stein@systec-electronic.com (Alexander Stein)
To: linux-arm-kernel@lists.infradead.org
Subject: BUG: spinlock recursion on CPU#0
Date: Thu, 21 Oct 2010 16:12:28 +0200 [thread overview]
Message-ID: <201010211612.46685.alexander.stein@systec-electronic.com> (raw)
Hello,
I tried a demo app which results in a kernel BUG, the backtrace is as follows:
> BUG: spinlock recursion on CPU#0, demogui/507
> lock: c3e15590, .magic: dead4ead, .owner: demogui/507, .owner_cpu: 0
> [<c002a858>] (unwind_backtrace+0x0/0xec) from [<c01609ac>]
> (do_raw_spin_lock+0x48/0xac) [<c01609ac>] (do_raw_spin_lock+0x48/0xac)
> from [<c002bec4>] (adjust_pte+0x54/0x94) [<c002bec4>]
> (adjust_pte+0x54/0x94) from [<c002bfa4>] (make_coherent+0xa0/0xe4)
> [<c002bfa4>] (make_coherent+0xa0/0xe4) from [<c002c088>]
> (update_mmu_cache+0xa0/0xac) [<c002c088>] (update_mmu_cache+0xa0/0xac)
> from [<c007bfdc>] (__do_fault+0x334/0x414) [<c007bfdc>]
> (__do_fault+0x334/0x414) from [<c007d594>] (handle_mm_fault+0x108/0x2c8)
> [<c007d594>] (handle_mm_fault+0x108/0x2c8) from [<c002b658>]
> (__do_page_fault+0x6c/0xb8) [<c002b658>] (__do_page_fault+0x6c/0xb8) from
> [<c002b878>] (do_page_fault+0xb4/0x15c) [<c002b878>]
> (do_page_fault+0xb4/0x15c) from [<c0025264>] (do_DataAbort+0x34/0x94)
> [<c0025264>] (do_DataAbort+0x34/0x94) from [<c0025da0>]
> (ret_from_exception+0x0/0x10) Exception stack(0xc3e75fb0 to 0xc3e75ff8)
> 5fa0: 40fff000 000040a8 00000003
> 4089d3d0 5fc0: 0005e3a0 00000001 4089d3d0 0005c940 ffff0fc0 0005e480
> ffff0fc0 be81bda8 5fe0: 0005c940 be81bbc0 404798c0 404760ec 20000010
> ffffffff
The used version is a Linux-2.6.35.7+ (local patches) running on an
AT19SAM9263 (ARM926EJ-S). My test program is a QT application I cannot share.
After sme searching i found this patch:
http://permalink.gmane.org/gmane.linux.ports.arm.kernel/79676
I didn't try any of the demos in this patch, but I applied the changes and the
BUG didn't occur anymore.
Now I'm wondering what's the status of this patch and is this the right
approach to handle this problem.
Best regards
Alexander
next reply other threads:[~2010-10-21 14:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-21 14:12 Alexander Stein [this message]
2010-10-21 16:44 ` BUG: spinlock recursion on CPU#0 Mika Westerberg
2010-10-21 17:09 ` [PATCH RESEND] ARM: fix spinlock recursion in adjust_pte() Mika Westerberg
2010-10-22 6:28 ` Baruch Siach
2010-10-22 6:38 ` Mika Westerberg
2010-10-22 6:42 ` Baruch Siach
2010-10-22 7:08 ` Mika Westerberg
2010-10-22 8:01 ` Baruch Siach
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