From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-fsdevel@vger.kernel.org, npiggin@kernel.dk
Subject: Re: ->d_lock FUBAR (was Re: Linux 3.0-rc6)
Date: Wed, 13 Jul 2011 04:22:39 +0100 [thread overview]
Message-ID: <20110713032239.GN11013@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20110713025918.GM11013@ZenIV.linux.org.uk>
On Wed, Jul 13, 2011 at 03:59:18AM +0100, Al Viro wrote:
> I'm not sure how much do we care about stability of x->d_parent when
> x->d_lock is held. ->d_compare() is the most obvious potential area
> of trouble in that respect, but there might be more.
Oh, and another fun area is per-chain locks, of course ;-/ Look at
__d_drop(); reengineering the callers of d_drop() to make sure that
fscker's parent stays stable would be very painful and turning that
into loop-based variant is going to be interesting. Doable, but not
fun...
next prev parent reply other threads:[~2011-07-13 3:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-04 23:09 Linux 3.0-rc6 Linus Torvalds
2011-07-06 15:27 ` Arkadiusz Miśkiewicz
2011-07-11 6:03 ` Al Viro
2011-07-12 23:48 ` ->d_lock FUBAR (was Re: Linux 3.0-rc6) Al Viro
2011-07-13 0:04 ` Linus Torvalds
2011-07-13 0:56 ` Al Viro
2011-07-13 1:39 ` Al Viro
2011-07-13 2:40 ` Linus Torvalds
2011-07-13 2:59 ` Al Viro
2011-07-13 3:22 ` Al Viro [this message]
2011-07-13 3:56 ` Linus Torvalds
2011-07-14 7:21 ` Al Viro
2011-07-15 4:58 ` Al Viro
2011-07-13 1:48 ` Linus Torvalds
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