+ fuse-dont-set-clear-bdi_congested.patch added to -mm tree

+ fuse-dont-set-clear-bdi_congested.patch added to -mm tree

[akpm]

The patch titled
     Subject: fuse: don't set/clear bdi_congested
has been added to the -mm tree.  Its filename is
     fuse-dont-set-clear-bdi_congested.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/fuse-dont-set-clear-bdi_congested.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/fuse-dont-set-clear-bdi_congested.patch

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------------------------------------------------------
From: NeilBrown <neilb@suse.de>
Subject: fuse: don't set/clear bdi_congested

The bdo congestion framework is no longer used to manage writeout etc, so
drop updating it in fuse.

Link: https://lkml.kernel.org/r/164325158958.29787.9472805850412952920.stgit@noble.brown
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: Anna Schumaker <Anna.Schumaker@Netapp.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Paolo Valente <paolo.valente@linaro.org>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/fuse/control.c |   17 -----------------
 fs/fuse/dev.c     |    8 --------
 2 files changed, 25 deletions(-)

--- a/fs/fuse/control.c~fuse-dont-set-clear-bdi_congested
+++ a/fs/fuse/control.c
@@ -164,7 +164,6 @@ static ssize_t fuse_conn_congestion_thre
 {
 	unsigned val;
 	struct fuse_conn *fc;
-	struct fuse_mount *fm;
 	ssize_t ret;
 
 	ret = fuse_conn_limit_write(file, buf, count, ppos, &val,
@@ -178,22 +177,6 @@ static ssize_t fuse_conn_congestion_thre
 	down_read(&fc->killsb);
 	spin_lock(&fc->bg_lock);
 	fc->congestion_threshold = val;
-
-	/*
-	 * Get any fuse_mount belonging to this fuse_conn; s_bdi is
-	 * shared between all of them
-	 */
-
-	if (!list_empty(&fc->mounts)) {
-		fm = list_first_entry(&fc->mounts, struct fuse_mount, fc_entry);
-		if (fc->num_background < fc->congestion_threshold) {
-			clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC);
-			clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC);
-		} else {
-			set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC);
-			set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC);
-		}
-	}
 	spin_unlock(&fc->bg_lock);
 	up_read(&fc->killsb);
 	fuse_conn_put(fc);
--- a/fs/fuse/dev.c~fuse-dont-set-clear-bdi_congested
+++ a/fs/fuse/dev.c
@@ -315,10 +315,6 @@ void fuse_request_end(struct fuse_req *r
 				wake_up(&fc->blocked_waitq);
 		}
 
-		if (fc->num_background == fc->congestion_threshold && fm->sb) {
-			clear_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC);
-			clear_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC);
-		}
 		fc->num_background--;
 		fc->active_background--;
 		flush_bg_queue(fc);
@@ -540,10 +536,6 @@ static bool fuse_request_queue_backgroun
 		fc->num_background++;
 		if (fc->num_background == fc->max_background)
 			fc->blocked = 1;
-		if (fc->num_background == fc->congestion_threshold && fm->sb) {
-			set_bdi_congested(fm->sb->s_bdi, BLK_RW_SYNC);
-			set_bdi_congested(fm->sb->s_bdi, BLK_RW_ASYNC);
-		}
 		list_add_tail(&req->list, &fc->bg_queue);
 		flush_bg_queue(fc);
 		queued = true;
_

Patches currently in -mm which might be from neilb@suse.de are

remove-inode_congested.patch
remove-bdi_congested-and-wb_congested-and-related-functions.patch
f2fs-change-retry-waiting-for-f2fs_write_single_data_page.patch
f2f2-replace-some-congestion_wait-calls-with-io_schedule_timeout.patch
cephfs-dont-set-clear-bdi_congestion.patch
fuse-dont-set-clear-bdi_congested.patch
nfs-remove-congestion-control.patch
block-bfq-ioschedc-use-false-rather-than-blk_rw_async.patch
remove-congestion-tracking-framework.patch
mm-discard-__gfp_atomic.patch