From: Matthew Wilcox <willy@infradead.org>
To: NeilBrown <neilb@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
Jens Axboe <axboe@kernel.dk>, Oleg Nesterov <oleg@redhat.com>,
Chuck Lever <chuck.lever@oracle.com>,
Jeff Layton <jlayton@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nfs@vger.kernel.org
Subject: Re: [PATCH 1/2] Allow a kthread to declare that it calls task_work_run()
Date: Mon, 4 Dec 2023 02:25:12 +0000 [thread overview]
Message-ID: <ZW04iGENbNm3A/Ki@casper.infradead.org> (raw)
In-Reply-To: <20231204014042.6754-2-neilb@suse.de>
On Mon, Dec 04, 2023 at 12:36:41PM +1100, NeilBrown wrote:
> +++ b/fs/namespace.c
> @@ -1328,7 +1328,7 @@ static void mntput_no_expire(struct mount *mnt)
>
> if (likely(!(mnt->mnt.mnt_flags & MNT_INTERNAL))) {
> struct task_struct *task = current;
> - if (likely(!(task->flags & PF_KTHREAD))) {
> + if (likely((task->flags & PF_RUNS_TASK_WORK))) {
You could lose one set of parens here ...
if (likely(task->flags & PF_RUNS_TASK_WORK)) {
> #define PF_RANDOMIZE 0x00400000 /* Randomize virtual address space */
> -#define PF__HOLE__00800000 0x00800000
> +#define PF_RUNS_TASK_WORK 0x00800000 /* Will call task_work_run() periodically */
And you could lose "Will" here:
#define PF_RUNS_TASK_WORK 0x00800000 /* Calls task_work_run() periodically */
> diff --git a/kernel/task_work.c b/kernel/task_work.c
> index 95a7e1b7f1da..aec19876e121 100644
> --- a/kernel/task_work.c
> +++ b/kernel/task_work.c
> @@ -183,3 +183,4 @@ void task_work_run(void)
> } while (work);
> }
> }
> +EXPORT_SYMBOL(task_work_run);
_GPL?
next prev parent reply other threads:[~2023-12-04 2:25 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-04 1:36 [PATCH 0/2 v2] Move all file-close work for nfsd into nfsd threads NeilBrown
2023-12-04 1:36 ` [PATCH 1/2] Allow a kthread to declare that it calls task_work_run() NeilBrown
2023-12-04 2:13 ` Jens Axboe
2023-12-04 21:02 ` NeilBrown
2023-12-04 22:09 ` Jens Axboe
2023-12-04 22:27 ` NeilBrown
2023-12-05 11:14 ` Christian Brauner
2023-12-05 14:06 ` Jeff Layton
2023-12-05 21:28 ` NeilBrown
2023-12-05 21:58 ` Jens Axboe
2023-12-05 22:03 ` Jens Axboe
2023-12-05 22:16 ` NeilBrown
2023-12-05 23:23 ` NeilBrown
2023-12-05 23:31 ` Jens Axboe
2023-12-06 14:24 ` Christian Brauner
2023-12-08 1:40 ` NeilBrown
2023-12-06 14:29 ` Christian Brauner
2023-12-06 5:44 ` Christoph Hellwig
2023-12-04 2:25 ` Matthew Wilcox [this message]
2023-12-04 21:04 ` NeilBrown
2023-12-04 2:40 ` Al Viro
2023-12-04 16:12 ` Oleg Nesterov
2023-12-04 21:20 ` NeilBrown
2023-12-05 6:27 ` Dave Chinner
2023-12-05 6:41 ` Dave Chinner
2023-12-05 8:48 ` NeilBrown
2023-12-05 11:29 ` Christian Brauner
2023-12-05 11:25 ` Christian Brauner
2023-12-05 14:23 ` Chuck Lever
2023-12-04 1:36 ` [PATCH 2/2] nfsd: Don't leave work of closing files to a work queue NeilBrown
2023-12-04 16:58 ` Chuck Lever
2023-12-04 22:21 ` NeilBrown
2023-12-04 23:48 ` Chuck Lever
2023-12-05 6:36 ` kernel test robot
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