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From: Tejun Heo <tj@kernel.org>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: Imran Khan <imran.f.khan@oracle.com>,
	gregkh@linuxfoundation.org, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: Re: [RESEND PATCH v7 7/8] kernfs: Replace per-fs rwsem with hashed rwsems.
Date: Mon, 21 Mar 2022 06:46:53 -1000	[thread overview]
Message-ID: <Yjir/d5S3J1PTiux@slm.duckdns.org> (raw)
In-Reply-To: <YjgpaeFfFandY999@zeniv-ca.linux.org.uk>

On Mon, Mar 21, 2022 at 07:29:45AM +0000, Al Viro wrote:
...
> stabilizing the tree topology.  Turn it into rwlock if you wish,
> with that thing being a reader and existing users - writers.
> And don't bother with further scaling, until and unless you see a real
> contention on it.

Given how rare these renames are, in the (unlikely) case the rename rwsem
becomes a problem, we should probably just switch it to a percpu_rwsem.

Thanks.

-- 
tejun

  reply	other threads:[~2022-03-21 16:47 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-17  7:26 [RESEND PATCH v7 0/8] kernfs: Introduce interface to access global kernfs_open_file_mutex Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 1/8] " Imran Khan
2022-03-17 21:34   ` Al Viro
2022-04-05  5:36     ` Imran Khan
2022-04-05 14:24       ` Al Viro
2022-04-06  4:54         ` Imran Khan
2022-04-06 14:54           ` Al Viro
2022-04-06 15:18             ` Tejun Heo
2022-04-14  0:01           ` Imran Khan
2022-03-18 17:10   ` Eric W. Biederman
2022-03-21  0:10     ` Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 2/8] kernfs: Replace global kernfs_open_file_mutex with hashed mutexes Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 3/8] kernfs: Introduce interface to access kernfs_open_node_lock Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 4/8] kernfs: Replace global kernfs_open_node_lock with hashed spinlocks Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 5/8] kernfs: Use a per-fs rwsem to protect per-fs list of kernfs_super_info Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 6/8] kernfs: Introduce interface to access per-fs rwsem Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 7/8] kernfs: Replace per-fs rwsem with hashed rwsems Imran Khan
2022-03-18  0:07   ` Al Viro
2022-03-21  1:57     ` Imran Khan
2022-03-21  7:29       ` Al Viro
2022-03-21 16:46         ` Tejun Heo [this message]
2022-03-21 17:55           ` Al Viro
2022-03-21 19:20             ` Tejun Heo
2022-03-22  2:40               ` Al Viro
2022-03-22 17:08                 ` Tejun Heo
2022-03-22 20:26                   ` Al Viro
2022-03-22 21:20                     ` Tejun Heo
2022-03-28  0:15                 ` Imran Khan
2022-03-28 17:30                   ` Tejun Heo
2022-03-30  2:23                 ` Imran Khan
2022-03-17  7:26 ` [RESEND PATCH v7 8/8] kernfs: Add a document to describe hashed locks used in kernfs Imran Khan

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