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DragonFly bugs List (threaded) for 2012-08
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[DragonFlyBSD - Bug #2374] softupdates locking bug

From: John Marino via Redmine <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 14 Aug 2012 03:35:46 -0700

Issue #2374 has been updated by John Marino.

I hit this exact panic again today.
Do you need the core or is the first one good enough?
Bug #2374: softupdates locking bug

Author: Venkatesh Srinivas
Status: New
Priority: Normal
Target version: 

softupdates may still have some locking issues:

In -master:
* http://leaf.dragonflybsd.org/~marino/core/core.20120523.txt
Panic where softdep_update_inodeblock() called bwrite() with a NULL buffer

getdirtybuf returned 'gotit', yet it either returned a NULL bp or the buffer was nulled after
it was saved in the inodedep structure. getdirtybuf can block and does release the softdep
lock while locking dirty buffers, but it is not clear if anyone can race in and result in the failure mode seen.

* (from 3.0.3 catchall bug (2336)):
Deadlock in -master with softdep. No more details available.

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