[DragonFlyBSD - Bug #2374] (Resolved) softupdates locking bug

[Venkatesh Srinivas via Redmine]

Issue #2374 has been updated by Venkatesh Srinivas.

Status changed from Feedback to Resolved

vnode LRU deadlock was solved by 62ae46c924bd3c2efd985c79dac02be03360e6a6. flush_pagedep_deps panic was solved by ca55765aeb1b1a6aa5f39b49ea1e514c7ab60178.

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Bug #2374: softupdates locking bug
http://bugs.dragonflybsd.org/issues/2374

Author: Venkatesh Srinivas
Status: Resolved
Priority: Normal
Assignee: 
Category: 
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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