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authorLinus Torvalds <torvalds@linux-foundation.org>2018-11-02 19:25:48 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2018-11-02 19:25:48 +0100
commit5f21585384a4a69b8bfdd2cae7e3648ae805f57d (patch)
treeb976d6e847b7209fb54cf78821a59951a7e9e8cd /Documentation/admin-guide/cgroup-v2.rst
parentMerge tag 'pwm/for-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff)
parentnvme-pci: fix conflicting p2p resource adds (diff)
downloadlinux-5f21585384a4a69b8bfdd2cae7e3648ae805f57d.tar.xz
linux-5f21585384a4a69b8bfdd2cae7e3648ae805f57d.zip
Merge tag 'for-linus-20181102' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe: "The biggest part of this pull request is the revert of the blkcg cleanup series. It had one fix earlier for a stacked device issue, but another one was reported. Rather than play whack-a-mole with this, revert the entire series and try again for the next kernel release. Apart from that, only small fixes/changes. Summary: - Indentation fixup for mtip32xx (Colin Ian King) - The blkcg cleanup series revert (Dennis Zhou) - Two NVMe fixes. One fixing a regression in the nvme request initialization in this merge window, causing nvme-fc to not work. The other is a suspend/resume p2p resource issue (James, Keith) - Fix sg discard merge, allowing us to merge in cases where we didn't before (Jianchao Wang) - Call rq_qos_exit() after the queue is frozen, preventing a hang (Ming) - Fix brd queue setup, fixing an oops if we fail setting up all devices (Ming)" * tag 'for-linus-20181102' of git://git.kernel.dk/linux-block: nvme-pci: fix conflicting p2p resource adds nvme-fc: fix request private initialization blkcg: revert blkcg cleanups series block: brd: associate with queue until adding disk block: call rq_qos_exit() after queue is frozen mtip32xx: clean an indentation issue, remove extraneous tabs block: fix the DISCARD request merge
Diffstat (limited to 'Documentation/admin-guide/cgroup-v2.rst')
-rw-r--r--Documentation/admin-guide/cgroup-v2.rst8
1 files changed, 3 insertions, 5 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 8384c681a4b2..476722b7b636 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1879,10 +1879,8 @@ following two functions.
wbc_init_bio(@wbc, @bio)
Should be called for each bio carrying writeback data and
- associates the bio with the inode's owner cgroup and the
- corresponding request queue. This must be called after
- a queue (device) has been associated with the bio and
- before submission.
+ associates the bio with the inode's owner cgroup. Can be
+ called anytime between bio allocation and submission.
wbc_account_io(@wbc, @page, @bytes)
Should be called for each data segment being written out.
@@ -1901,7 +1899,7 @@ the configuration, the bio may be executed at a lower priority and if
the writeback session is holding shared resources, e.g. a journal
entry, may lead to priority inversion. There is no one easy solution
for the problem. Filesystems can try to work around specific problem
-cases by skipping wbc_init_bio() or using bio_associate_create_blkg()
+cases by skipping wbc_init_bio() or using bio_associate_blkcg()
directly.