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Date: Fri, 8 Jun 2012 23:27:34 +0100 From: Al Viro <viro@...IV.linux.org.uk> To: Andrew Morton <akpm@...ux-foundation.org> Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Boaz Harrosh <bharrosh@...asas.com>, Tao Ma <boyu.mt@...bao.com>, Nick Piggin <npiggin@...nel.dk>, "Dmitry V. Levin" <ldv@...linux.org>, v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-afs@...ts.infradead.org, linux-btrfs@...r.kernel.org, ceph-devel@...r.kernel.org, linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org, codalist@...EMANN.coda.cs.cmu.edu, ecryptfs@...r.kernel.org, osd-dev@...n-osd.org, linux-ext4@...r.kernel.org, fuse-devel@...ts.sourceforge.net, linux-mtd@...ts.infradead.org, jfs-discussion@...ts.sourceforge.net, logfs@...fs.org, linux-nfs@...r.kernel.org, linux-nilfs@...r.kernel.org, linux-ntfs-dev@...ts.sourceforge.net, ocfs2-devel@....oracle.com, reiserfs-devel@...r.kernel.org Subject: Re: [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems On Fri, Jun 08, 2012 at 03:25:50PM -0700, Andrew Morton wrote: > A neater implementation might be to add a kmem_cache* argument to > unregister_filesystem(). If that is non-NULL, unregister_filesystem() > does the rcu_barrier() and destroys the cache. That way we get to > delete (rather than add) a bunch of code from all filesystems and new > and out-of-tree filesystems cannot forget to perform the rcu_barrier(). There's often enough more than one cache, so that one is no-go. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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