Messages in this thread | | | Date | Mon, 21 Jul 2008 13:03:50 +0200 | From | "Vegard Nossum" <> | Subject | Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten |
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On Mon, Jul 21, 2008 at 12:50 PM, Ingo Molnar <mingo@elte.hu> wrote: > the problem is, most of the crashes dont come with any usable dump. This > is a laptop so netconsole is the only reliable route out - and if > something in networking crashes chances are that it hoses netconsole > before it can get anything out. > > Another thing is that i'm activating netconsole on this box via a kernel > boot line and from within a bzImage (to get it activated as early as > possible) - maybe that's a tad too early for certain initialization > sequences? > > I could try run tests with netconsole deactivated, if you think that's a > worthwile line of probing this problem. (although that would make me do > blind tests in essence - having kernel log output is really essential.)
How about posting your custom patches for public review? :-D
(There was recently an odd case of kzalloc() succeeding even though it was called before the slab caches were initialized -- and it only generated a warning about irqs-on happening too early. I just mean to say that it _can_ happen. On another machine, it crashed spectacularly. I guess you're not enabling the netconsole before slab allocator is up?)
Vegard
-- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036
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