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DragonFly bugs List (threaded) for 2005-01
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Re: Tentitive UFS patch to narrow down dup alloc panics

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Thu, 13 Jan 2005 15:01:58 -0800 (PST)

:On Thu, 13 Jan 2005 13:22:34 -0800 (PST), Matthew Dillon
:<dillon@xxxxxxxxxxxxxxxxxxxx> wrote:
:>     I would appreciate it if everyone who regularly gets 'dup alloc' inode
:>     panics would apply this patch, install a new kernel, reboot into single
:>     user, and fsck (to get a 'clean slate'), then reboot normally and see if
:>     the dup alloc panic still occurs.
:I think testing for this will be around a six month long period.
:                                            -David
:                                            Steven David Rhodus
:                                            <drhodus@xxxxxxxxxxx>

    Quite possibly, but if it does not introduce any new bugs I will
    probably want to commit it anyway.  I just think it's too dangerous
    to try to reuse an inode that has not yet been completely disposed 
    of, especially with softupdates active.  It's also possible that it
    might improve performance.  With dirpref active inodes are far more
    likely to be reused quickly and this avoids a blocking condition in
    VGET by avoiding inodes that are in the process of being destroyed.

					Matthew Dillon 

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