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Re: kern/12404 (panic: ffs_alloccg: map corrupted)
The following reply was made to PR kern/12404; it has been noted by GNATS.
From: David Laight <david%l8s.co.uk@localhost>
Subject: Re: kern/12404 (panic: ffs_alloccg: map corrupted)
Date: Thu, 17 Jul 2008 17:52:53 +0100
On Thu, Jul 17, 2008 at 06:40:02AM +0000, Havard Eidnes wrote:
> Subject: Re: kern/12404 (panic: ffs_alloccg: map corrupted)
> I had another occurrance, and per request, here's "show reg"
> output together with a backtrace. This is with 4.99.70 on the
> new system (dual-Xeon 2.2GHz, 2GB memory, 205GB RAID on ciss(4)):
> Looking at the code, it appears that the backtrace is misleading,
> the panic() is in ffs_mapsearch(), not in ffs_alloccgblk(). I'll
> admit that I don't understand why ddb gets the backtrace wrong.
Almost certainly due to leaf subroutines and/or static functions
not being in the symbol table.
Without having looked at how this code gets called, but which mutex
controls access to the allocation maps in each 'cylinder group' ?
David Laight: david%l8s.co.uk@localhost
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