Re: ffs_blkfree panic + lockmgr panic

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Matthew Dillon wrote:
>     So far I haven't had any luck reproducing the blkfree panic.  I'm doing a
>     parallel buildworld and vinum init in a loop.

I could not reproduce it either.  I remembered something else:

Usually I did a
	sync
	mount -a -u -o ro

before fiddling with vinum, but /dev never re-mounted ro because of open files.  The other file systems though did, but nevertheless showed inconsistencies in fsck -f afterwards.  I don't know if this might be connected.

>     I did find at least one issue with the patch set... you have to use
>     getpbuf() rather then trypbuf().  You can't have temporary resource 
>     failures in the places where trypbuf() is being used.  This is unrelated
>     to the bug, though.

I am not sure that I understand what you mean:  The original (and now used) code checks the result of geteblk(), but this can't fail anyways.  So I decided to go with trypbuf() instead of getpbuf() so that those functions (all called from ioctl) could fail and not block.

>     If you could get a crash dump of the blkfree panic onto leaf I'd like 
>     to take a look at it.

Will do, but it will take some time, as it is >200mb compressed.

cheers
 simon

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