The patch titled
Subject: writeback, cgroup: split out the functional part of inode_switch_wbs_work_fn()
has been added to the -mm tree. Its filename is
writeback-cgroup-split-out-the-functional-part-of-inode_switch_wbs_work_fn.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/writeback-cgroup-split-out-the-functional-part-of-inode_switch_wbs_work_fn.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/writeback-cgroup-split-out-the-functional-part-of-inode_switch_wbs_work_fn.patch
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------------------------------------------------------
From: Roman Gushchin <guro@xxxxxx>
Subject: writeback, cgroup: split out the functional part of inode_switch_wbs_work_fn()
Split out the functional part of the inode_switch_wbs_work_fn() function
as inode_do switch_wbs() to reuse it later for switching inodes attached
to dying cgwbs.
This commit doesn't bring any functional changes.
Link: https://lkml.kernel.org/r/20210608230225.2078447-7-guro@xxxxxx
Signed-off-by: Roman Gushchin <guro@xxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Acked-by: Dennis Zhou <dennis@xxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Dave Chinner <dchinner@xxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fs-writeback.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
--- a/fs/fs-writeback.c~writeback-cgroup-split-out-the-functional-part-of-inode_switch_wbs_work_fn
+++ a/fs/fs-writeback.c
@@ -351,15 +351,12 @@ static void bdi_up_write_wb_switch_rwsem
up_write(&bdi->wb_switch_rwsem);
}
-static void inode_switch_wbs_work_fn(struct work_struct *work)
+static void inode_do_switch_wbs(struct inode *inode,
+ struct bdi_writeback *new_wb)
{
- struct inode_switch_wbs_context *isw =
- container_of(to_rcu_work(work), struct inode_switch_wbs_context, work);
- struct inode *inode = isw->inode;
struct backing_dev_info *bdi = inode_to_bdi(inode);
struct address_space *mapping = inode->i_mapping;
struct bdi_writeback *old_wb = inode->i_wb;
- struct bdi_writeback *new_wb = isw->new_wb;
XA_STATE(xas, &mapping->i_pages, 0);
struct page *page;
bool switched = false;
@@ -470,11 +467,17 @@ skip_switch:
wb_wakeup(new_wb);
wb_put(old_wb);
}
- wb_put(new_wb);
+}
- iput(inode);
- kfree(isw);
+static void inode_switch_wbs_work_fn(struct work_struct *work)
+{
+ struct inode_switch_wbs_context *isw =
+ container_of(to_rcu_work(work), struct inode_switch_wbs_context, work);
+ inode_do_switch_wbs(isw->inode, isw->new_wb);
+ wb_put(isw->new_wb);
+ iput(isw->inode);
+ kfree(isw);
atomic_dec(&isw_nr_in_flight);
}
_
Patches currently in -mm which might be from guro@xxxxxx are
writeback-cgroup-do-not-switch-inodes-with-i_will_free-flag.patch
writeback-cgroup-add-smp_mb-to-cgroup_writeback_umount.patch
writeback-cgroup-increment-isw_nr_in_flight-before-grabbing-an-inode.patch
writeback-cgroup-switch-to-rcu_work-api-in-inode_switch_wbs.patch
writeback-cgroup-keep-list-of-inodes-attached-to-bdi_writeback.patch
writeback-cgroup-split-out-the-functional-part-of-inode_switch_wbs_work_fn.patch
writeback-cgroup-support-switching-multiple-inodes-at-once.patch
writeback-cgroup-release-dying-cgwbs-by-switching-attached-inodes.patch
