Re: diag
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From: Carl K. <ca...@pe...> - 2012-10-24 22:23:49
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On Wed, Oct 24, 2012 at 5:02 PM, Stefan Richter <st...@s5...> wrote: >> On Oct 23 Carl Karsten wrote: >> > Linux cnt2 3.2.0-26-generic #41-Ubuntu SMP Thu Jun 14 17:49:24 UTC >> > 2012 x86_64 x86_64 x86_64 GNU/Linux >> [...] >> > sudo ./async-loop-ck >> [...] >> > after about a min.. >> > >> > stack dump on the console, but I still have an ssh session running. >> > >> > top line of console: >> > unable to handle kernel NULL pointer dereference at 00000000000000690 > > Carl sent screenshots. I uploaded them to: > https://bugzilla.kernel.org/show_bug.cgi?id=49491 > https://bugzilla.kernel.org/attachment.cgi?id=84731 > https://bugzilla.kernel.org/attachment.cgi?id=84741 > > The call trace is: > in page_waitqueue+06e/0x90 > unlock_page+0x1d/0x40 > filemap_fault+0x3ba/0x3e0 > __do_fault+0x72/0x550 > ? rb_insert_color+0x110/0x150 > handle_pte_fault+0xfa0x200 > ? cpumask_any_but+0x2d/0x40 > handle_mm_fault+0x1f8/0x350 > do_page_fault+0x150/0x520 > ? mprotect_fixup+0x17d/0x2b0 > ? sys_mprotect+0x1f0/0x250 > page_fault+0x25/0x30 > > Carl, is this rare or frequent? Can't say. It has happened once. But I have only run ./async-loop-ck maybe 10 times. sometimes it has 'hung' and I ^Ced it. -- Carl K |