| Message ID | 20171129232356.28296-8-mcgrof@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
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 >
On Thu, Nov 30, 2017 at 5:21 PM, Jan Kara <jack@suse.cz> wrote: > 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... We need that one (or equivalent) for the runtime PM workqueue at least. Thanks, Rafael
On Thu, Nov 30, 2017 at 09:32:53PM +0100, Rafael J. Wysocki wrote: > On Thu, Nov 30, 2017 at 5:21 PM, Jan Kara <jack@suse.cz> wrote: > > 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/$FS/ > > > > I think your rule misses WQ_FREEZABLE flag for workqueues? That would be > > also good to get rid of... > > We need that one (or equivalent) for the runtime PM workqueue at least. I think Jan was talking about all the WQ_FREEZABLE flags in filesystem workqueues (such as all the XFS wqs) that are no longer necessary once filesystems are frozen appropriately. Cheers, Dave.
On Friday, December 1, 2017 12:30:33 AM CET Dave Chinner wrote: > On Thu, Nov 30, 2017 at 09:32:53PM +0100, Rafael J. Wysocki wrote: > > On Thu, Nov 30, 2017 at 5:21 PM, Jan Kara <jack@suse.cz> wrote: > > > On Wed 29-11-17 15:23:52, Luis R. Rodriguez wrote: > > >> This removes superflous freezer calls as they are no longer needed > > >> as the VFS now performs filesystem freezing/thaw if the filesystem has > > >> support for it. > > >> > > >> The following Coccinelle rule was used as follows: > > >> > > >> spatch --sp-file fs-freeze-cleanup.cocci --in-place fs/$FS/ > > > > > > I think your rule misses WQ_FREEZABLE flag for workqueues? That would be > > > also good to get rid of... > > > > We need that one (or equivalent) for the runtime PM workqueue at least. > > I think Jan was talking about all the WQ_FREEZABLE flags in > filesystem workqueues (such as all the XFS wqs) that are no longer > necessary once filesystems are frozen appropriately. I see, thanks. That was unclear to me, sorry for the confusion. Thanks, Rafael
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); }
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/ @ 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(-)