From: Tejun Heo <tj@kernel.org>
To: jack@suse.cz, axboe@kernel.dk, clm@fb.com, jbacik@fb.com
Cc: kernel-team@fb.com, linux-kernel@vger.kernel.org,
linux-btrfs@vger.kernel.org
Subject: [PATCHSET] cgroup, writeback, btrfs: make sure btrfs issues metadata IOs from the root cgroup
Date: Mon, 9 Oct 2017 14:29:08 -0700 [thread overview]
Message-ID: <20171009212911.473208-1-tj@kernel.org> (raw)
Hello,
btrfs has different ways to issue metadata IOs and may end up issuing
metadata or otherwise shared IOs from a non-root cgroup, which can
lead to priority inversion and ineffective IO isolation.
This patchset makes sure that btrfs issues all metadata and shared IOs
from the root cgroup by exempting btree_inodes from cgroup writeback
and explicitly associating shared IOs with the root cgroup.
This patchset containst he following three patches
[PATCH 1/3] cgroup, writeback: replace SB_I_CGROUPWB with per-inode
[PATCH 2/3] cgroup, writeback: implement submit_bh_blkcg_css()
[PATCH 3/3] btrfs: ensure that metadata and flush are issued from the
and is also available in the following git branch
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-cgroup-btrfs-metadata
diffstat follows. Thanks.
fs/block_dev.c | 3 +--
fs/btrfs/check-integrity.c | 2 +-
fs/btrfs/disk-io.c | 4 ++++
fs/btrfs/ioctl.c | 6 +++++-
fs/btrfs/super.c | 1 -
fs/buffer.c | 12 ++++++++++++
fs/ext2/inode.c | 3 ++-
fs/ext2/super.c | 1 -
fs/ext4/inode.c | 5 ++++-
fs/ext4/super.c | 2 --
fs/fs-writeback.c | 1 +
include/linux/backing-dev.h | 2 +-
include/linux/buffer_head.h | 11 +++++++++++
include/linux/fs.h | 3 ++-
include/linux/writeback.h | 6 ++++--
15 files changed, 48 insertions(+), 14 deletions(-)
--
tejun
next reply other threads:[~2017-10-09 21:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-09 21:29 Tejun Heo [this message]
2017-10-09 21:29 ` [PATCH 1/3] cgroup, writeback: replace SB_I_CGROUPWB with per-inode S_CGROUPWB Tejun Heo
2017-10-10 8:56 ` Jan Kara
2017-10-09 21:29 ` [PATCH 2/3] cgroup, writeback: implement submit_bh_blkcg_css() Tejun Heo
2017-10-10 9:31 ` Jan Kara
2017-10-09 21:29 ` [PATCH 3/3] btrfs: ensure that metadata and flush are issued from the root cgroup Tejun Heo
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