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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: Mindaugas Rasiukevicius <>
Subject: Re: kern/12404 (panic: ffs_alloccg: map corrupted)
Date: Sat, 24 May 2008 00:01:40 +0100

 Here is the patch which may fix the problem:
 It is obtained from FreeBSD (see revision 1.52 and 1.53 of ffs_balloc.c),
 with some minor changes. It looks for me that fail-path could simplified,
 eg. unwindidx could probably be removed. However I do not understand (or
 misunderstand) this code enough to claim anything.
 Would be great if some FFS-competent developer would take a deeper look at
 all the logic of this function.
 Best regards,

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