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List:       haiku-bugs
Subject:    [haiku-bugs] Re: [Haiku] #9806: Opening FAT32 partition yields PANIC: double mutex lock
From:       "ttcoder" <trac () haiku-os ! org>
Date:       2013-05-31 18:16:25
Message-ID: 057.d468c84b4456e6c61f953960c975848d () haiku-os ! org
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#9806: Opening FAT32 partition yields PANIC: double mutex lock
--------------------------------+----------------------------
   Reporter:  ttcoder           |      Owner:  nobody
       Type:  bug               |     Status:  new
   Priority:  normal            |  Milestone:  R1
  Component:  File Systems/FAT  |    Version:  R1/Development
 Resolution:                    |   Keywords:
 Blocked By:                    |   Blocking:
Has a Patch:  0                 |   Platform:  All
--------------------------------+----------------------------

Comment (by ttcoder):

 Gotta borrow a camera, possibly this week-end. I'll come back to this
 ticket then.

 In the meantime I've posted a bit more stack trace (updated in the
 original comment for clarity). It seems things start to go south as the
 FAT addon wants to write to the syslog with dprintf(), which triggers a
 page fault, and then vm_page_fault() itself goes south in a dprintf() call
 of its own (!).

 Also...

 - hrev44xxx panics exactly the same as this more recent partition here, so
 something is up with that FAT volume indeed, since I used to access it
 without trouble from both Haiku revs.

 - mounting an NTFS partition (the only other partition that is not BFS)
 works 100%, as well as reading from it. No other FAT partition to try out
 here.

 - I'm able to "continue" out of KDL, but then after a few seconds the
 system comes to a hard freeze (I needed to hold power button for 5 secs).

 Will hopefully return with more..

--
Ticket URL: <http://dev.haiku-os.org/ticket/9806#comment:3>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.

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