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From: Jan Kara <jack@suse.cz>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: viro@zeniv.linux.org.uk, bart.vanassche@wdc.com,
	ming.lei@redhat.com, tytso@mit.edu, darrick.wong@oracle.com,
	jikos@kernel.org, rjw@rjwysocki.net, pavel@ucw.cz,
	len.brown@intel.com, linux-fsdevel@vger.kernel.org,
	boris.ostrovsky@oracle.com, jgross@suse.com,
	todd.e.brandt@linux.intel.com, nborisov@suse.com, jack@suse.cz,
	martin.petersen@oracle.com, ONeukum@suse.com,
	oleksandr@natalenko.name, oleg.b.antonyan@gmail.com,
	yu.chen.surf@gmail.com, dan.j.williams@intel.com,
	linux-pm@vger.kernel.org, linux-block@vger.kernel.org,
	linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 07/11] xfs: remove not needed freezing calls
Date: Thu, 30 Nov 2017 17:21:55 +0100
Message-ID: <20171130162155.GB28180@quack2.suse.cz> (raw)
In-Reply-To: <20171129232356.28296-8-mcgrof@kernel.org>

On Wed 29-11-17 15:23:52, Luis R. Rodriguez wrote:
> This removes superflous freezer calls as they are no longer needed
> as the VFS now performs filesystem freezing/thaw if the filesystem has
> support for it.
> 
> The following Coccinelle rule was used as follows:
> 
> spatch --sp-file fs-freeze-cleanup.cocci --in-place fs/$FS/

I think your rule misses WQ_FREEZABLE flag for workqueues? That would be
also good to get rid of...

								Honza

> 
> @ has_freeze_fs @
> identifier super_ops;
> expression freeze_op;
> @@
> 
> struct super_operations super_ops = {
> 	.freeze_fs = freeze_op,
> };
> 
> @ remove_set_freezable depends on has_freeze_fs @
> expression time;
> statement S, S2, S3;
> expression task;
> @@
> 
> (
> -	set_freezable();
> |
> -	if (try_to_freeze())
> -		continue;
> |
> -	try_to_freeze();
> |
> -	freezable_schedule();
> +	schedule();
> |
> -	freezable_schedule_timeout(time);
> +	schedule_timeout(time);
> |
> -	if (freezing(task)) { S }
> |
> -	if (freezing(task)) { S }
> -	else
> 	{ S2 }
> |
> -	freezing(current)
> )
> 
> Generated-by: Coccinelle SmPL
> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
> ---
>  fs/xfs/xfs_trans_ail.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
> index cef89f7127d3..1f3dd10a9d00 100644
> --- a/fs/xfs/xfs_trans_ail.c
> +++ b/fs/xfs/xfs_trans_ail.c
> @@ -513,7 +513,6 @@ xfsaild(
>  	long		tout = 0;	/* milliseconds */
>  
>  	current->flags |= PF_MEMALLOC;
> -	set_freezable();
>  
>  	while (1) {
>  		if (tout && tout <= 20)
> @@ -551,19 +550,17 @@ xfsaild(
>  		if (!xfs_ail_min(ailp) &&
>  		    ailp->xa_target == ailp->xa_target_prev) {
>  			spin_unlock(&ailp->xa_lock);
> -			freezable_schedule();
> +			schedule();
>  			tout = 0;
>  			continue;
>  		}
>  		spin_unlock(&ailp->xa_lock);
>  
>  		if (tout)
> -			freezable_schedule_timeout(msecs_to_jiffies(tout));
> +			schedule_timeout(msecs_to_jiffies(tout));
>  
>  		__set_current_state(TASK_RUNNING);
>  
> -		try_to_freeze();
> -
>  		tout = xfsaild_push(ailp);
>  	}
>  
> -- 
> 2.15.0
> 
-- 
Jan Kara <jack@suse.com>
SUSE Labs, CR

  reply index

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-29 23:23 [PATCH 00/11] fs: use freeze_fs on suspend/hibernate Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 01/11] fs: provide unlocked helper for freeze_super() Luis R. Rodriguez
2017-11-30 16:58   ` Jan Kara
2017-11-29 23:23 ` [PATCH 02/11] fs: provide unlocked helper thaw_super() Luis R. Rodriguez
2017-11-30 16:59   ` Jan Kara
2017-11-29 23:23 ` [PATCH 03/11] fs: add frozen sb state helpers Luis R. Rodriguez
2017-11-30 17:13   ` Jan Kara
2017-11-30 19:05     ` Luis R. Rodriguez
2017-12-01 11:47       ` Jan Kara
2017-12-01 21:13         ` Luis R. Rodriguez
2017-12-21 11:03           ` Jan Kara
2018-04-18  0:59             ` Luis R. Rodriguez
2018-04-18 10:12               ` Jan Kara
2018-04-20 18:49               ` Luis R. Rodriguez
2018-04-21 23:53                 ` Jan Kara
2018-04-22  1:22                   ` Luis R. Rodriguez
2018-04-22  2:53     ` Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 04/11] fs: distinguish between user initiated freeze and kernel initiated freeze Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 05/11] fs: add iterate_supers_excl() and iterate_supers_reverse_excl() Luis R. Rodriguez
2017-11-29 23:48   ` Rafael J. Wysocki
2017-11-30  0:22     ` Luis R. Rodriguez
2017-11-30  1:34     ` Dave Chinner
2017-11-30  1:40       ` Rafael J. Wysocki
2017-11-30 16:57   ` Jan Kara
2017-11-29 23:23 ` [PATCH 06/11] fs: freeze on suspend and thaw on resume Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 07/11] xfs: remove not needed freezing calls Luis R. Rodriguez
2017-11-30 16:21   ` Jan Kara [this message]
2017-11-30 20:32     ` Rafael J. Wysocki
2017-11-30 23:30       ` Dave Chinner
2017-11-30 23:40         ` Rafael J. Wysocki
2017-11-29 23:23 ` [PATCH 08/11] ext4: " Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 09/11] f2fs: " Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 10/11] nilfs2: " Luis R. Rodriguez
2017-11-29 23:23 ` [PATCH 11/11] jfs: " Luis R. Rodriguez
2017-11-30 16:36 ` [PATCH 00/11] fs: use freeze_fs on suspend/hibernate Yu Chen
2017-11-30 16:41   ` Jiri Kosina
2017-11-30 16:50     ` Yu Chen
2017-12-01 19:05     ` Jeff Layton
2017-12-01 21:51       ` Dave Chinner
2017-11-30 17:01 ` Bart Van Assche
2017-11-30 19:42   ` Luis R. Rodriguez
2017-11-30 20:53     ` Bart Van Assche
2017-11-30 21:03       ` Dave Chinner
2017-11-30 21:51 ` Pavel Machek
2017-12-01  0:44   ` Luis R. Rodriguez
2017-12-13  1:09 ` Rafael J. Wysocki
2017-12-19 16:50   ` Luis R. Rodriguez

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