Cc: Christoph Hellwig <hch infradead org>, Pekka Enberg <penberg gmail com>, akpm osdl org, linux-cluster redhat com, Zach Brown <zab zabbo net>, linux-kernel vger kernel org
Subject: [Linux-cluster] Re: GFS
Date: Wed, 10 Aug 2005 23:18:48 +0300
Mark Fasheh writes:
Hmm, well today in OCFS2 if you're not coming from read or write, the lock
is held only for the duration of ->nopage so I don't think we could get into
any deadlocks for that usage.
Aah, I see GFS2 does that too so no deadlocks here. Thanks. You, however,
don't maintain the same level of data consistency when reads and writes
are from other filesystems as they use ->nopage.
Fixing this requires a generic vma walk in every write() and read(), no?
That doesn't seem such an hot idea which brings us back to using ->nopage
for taking the locks (but now the deadlocks are back).