From: Al Viro <viro@ZenIV.linux.org.uk>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Boaz Harrosh <bharrosh@panasas.com>, Tao Ma <boyu.mt@taobao.com>,
Nick Piggin <npiggin@kernel.dk>,
"Dmitry V. Levin" <ldv@altlinux.org>,
v9fs-developer@lists.sourceforge.net,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-afs@lists.infradead.org, linux-btrfs@vger.kernel.org,
ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org,
samba-technical@lists.samba.org,
codalist@TELEMANN.coda.cs.cmu.edu, ecryptfs@vger.kernel.org,
osd-dev@open-osd.org, linux-ext4@vger.kernel.org,
fuse-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org,
jfs-discussion@lists.sourceforge.net, logfs@logfs.org,
linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org,
linux-ntfs-dev@lists.sourceforge.net, ocfs2-devel@oss.oracle.com,
reiserfs-devel@vger.kernel.org
Subject: Re: [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems
Date: Fri, 8 Jun 2012 23:27:34 +0100 [thread overview]
Message-ID: <20120608222734.GT30000@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20120608152550.258d6a30.akpm@linux-foundation.org>
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.
WARNING: multiple messages have this Message-ID (diff)
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: jfs-discussion@lists.sourceforge.net,
"Dmitry V. Levin" <ldv@altlinux.org>,
linux-mtd@lists.infradead.org, ocfs2-devel@oss.oracle.com,
linux-afs@lists.infradead.org, codalist@TELEMANN.coda.cs.cmu.edu,
linux-cifs@vger.kernel.org, linux-nilfs@vger.kernel.org,
Boaz Harrosh <bharrosh@panasas.com>,
v9fs-developer@lists.sourceforge.net, linux-ext4@vger.kernel.org,
Nick Piggin <npiggin@kernel.dk>,
fuse-devel@lists.sourceforge.net, Tao Ma <boyu.mt@taobao.com>,
ecryptfs@vger.kernel.org, reiserfs-devel@vger.kernel.org,
osd-dev@open-osd.org, ceph-devel@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net,
samba-technical@lists.samba.org, linux-kernel@vger.kernel.org,
logfs@logfs.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
linux-fsdevel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-btrfs@vger.kernel.org
Subject: Re: [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems
Date: Fri, 8 Jun 2012 23:27:34 +0100 [thread overview]
Message-ID: <20120608222734.GT30000@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20120608152550.258d6a30.akpm@linux-foundation.org>
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.
WARNING: multiple messages have this Message-ID (diff)
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Boaz Harrosh <bharrosh@panasas.com>, Tao Ma <boyu.mt@taobao.com>,
Nick Piggin <npiggin@kernel.dk>,
"Dmitry V. Levin" <ldv@altlinux.org>,
v9fs-developer@lists.sourceforge.net,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-afs@lists.infradead.org, linux-btrfs@vger.kernel.org,
ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org,
samba-technical@lists.samba.org,
codalist@TELEMANN.coda.cs.cmu.edu, ecryptfs@vger.kernel.org,
osd-dev@open-osd.org, linux-ext4@vger.kernel.org,
fuse-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org,
jfs-discussion@lists.sourceforge.net, logfs@logfs.org,
linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org,
linux-ntfs-dev@lists.sourceforge.net, ocfs2-devel@oss.oracle.com,
reiserfs-devel@vger.kernel.org
Subject: [Ocfs2-devel] [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems
Date: Fri, 8 Jun 2012 23:27:34 +0100 [thread overview]
Message-ID: <20120608222734.GT30000@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20120608152550.258d6a30.akpm@linux-foundation.org>
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.
next prev parent reply other threads:[~2012-06-08 22:27 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-08 21:41 [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems Kirill A. Shutemov
2012-06-08 21:41 ` Kirill A. Shutemov
2012-06-08 21:41 ` Kirill A. Shutemov
2012-06-08 22:00 ` [RFC, PATCH] " Kirill A. Shutemov
2012-06-08 22:00 ` Kirill A. Shutemov
2012-06-08 22:00 ` Kirill A. Shutemov
2012-06-08 22:06 ` Linus Torvalds
2012-06-08 22:06 ` [Ocfs2-devel] " Linus Torvalds
2012-06-08 22:06 ` Linus Torvalds
2012-06-08 22:06 ` Linus Torvalds
2012-06-08 22:25 ` Al Viro
2012-06-08 22:25 ` [Ocfs2-devel] " Al Viro
2012-06-08 22:25 ` Al Viro
2012-06-08 22:25 ` Al Viro
2012-06-08 22:02 ` [RFC, PATCH, RESEND] " Andrew Morton
2012-06-08 22:02 ` [Ocfs2-devel] " Andrew Morton
2012-06-08 22:02 ` Andrew Morton
2012-06-08 22:14 ` Kirill A. Shutemov
2012-06-08 22:14 ` Kirill A. Shutemov
2012-06-08 22:23 ` Al Viro
2012-06-08 22:23 ` [Ocfs2-devel] " Al Viro
2012-06-08 22:23 ` Al Viro
2012-06-08 22:27 ` Linus Torvalds
2012-06-08 22:27 ` [Ocfs2-devel] " Linus Torvalds
2012-06-08 22:27 ` Linus Torvalds
2012-06-08 22:25 ` Andrew Morton
2012-06-08 22:25 ` [Ocfs2-devel] " Andrew Morton
2012-06-08 22:25 ` Andrew Morton
2012-06-08 22:27 ` Al Viro [this message]
2012-06-08 22:27 ` [Ocfs2-devel] " Al Viro
2012-06-08 22:27 ` Al Viro
2012-06-08 22:31 ` Andrew Morton
2012-06-08 22:31 ` [Ocfs2-devel] " Andrew Morton
2012-06-08 22:31 ` Andrew Morton
2012-06-08 22:36 ` Al Viro
2012-06-08 22:40 ` Andrew Morton
2012-06-08 23:32 ` Kirill A. Shutemov
2012-06-08 23:31 ` Kirill A. Shutemov
2012-06-08 23:31 ` Kirill A. Shutemov
2012-06-08 23:37 ` Andrew Morton
2012-06-08 23:37 ` [Ocfs2-devel] " Andrew Morton
2012-06-08 23:37 ` Andrew Morton
2012-06-08 23:37 ` Andrew Morton
2012-06-08 23:46 ` Linus Torvalds
2012-06-08 23:46 ` [Ocfs2-devel] " Linus Torvalds
2012-06-08 23:46 ` Linus Torvalds
2012-06-09 0:28 ` Andrew Morton
2012-06-09 0:28 ` [Ocfs2-devel] " Andrew Morton
2012-06-09 0:28 ` Andrew Morton
2012-06-09 7:06 ` Marco Stornelli
2012-06-09 7:06 ` [Ocfs2-devel] " Marco Stornelli
2012-06-09 7:06 ` Marco Stornelli
2012-06-09 7:06 ` Marco Stornelli
[not found] ` <4FD2F5F4.1000106-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-06-09 7:25 ` Andrew Morton
2012-06-09 7:25 ` [Ocfs2-devel] " Andrew Morton
2012-06-09 7:25 ` Andrew Morton
2012-06-09 7:25 ` Andrew Morton
2012-06-11 9:16 ` Kirill A. Shutemov
2012-06-11 9:16 ` Kirill A. Shutemov
2012-06-11 9:16 ` Kirill A. Shutemov
2012-06-08 23:28 ` Kirill A. Shutemov
2012-06-08 23:28 ` Kirill A. Shutemov
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