Yafang Shao 19343b5bdd mm/page-writeback: introduce tracepoint for wait_on_page_writeback() ...

Recently there have been some hung tasks on our server due to
wait_on_page_writeback(), and we want to know the details of this
PG_writeback, i.e.  this page is writing back to which device.  But it is
not so convenient to get the details.

I think it would be better to introduce a tracepoint for diagnosing the
writeback details.

Link: http://lkml.kernel.org/r/1556274402-19018-1-git-send-email-laoar.shao@gmail.com
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2019-05-14 09:47:51 -07:00

..

acpi

Merge tag 'driver-core-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2019-05-07 13:01:40 -07:00

asm-generic

hugetlb: allow to free gigantic pages regardless of the configuration

2019-05-14 09:47:47 -07:00

clocksource

…

crypto

crypto: shash - remove shash_desc::flags

2019-04-25 15:38:12 +08:00

drm

Merge tag 'drm-next-2019-05-09' of git://anongit.freedesktop.org/drm/drm

2019-05-08 21:35:19 -07:00

dt-bindings

Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

2019-05-09 14:50:09 -07:00

keys

KEYS: trusted: fix -Wvarags warning

2019-04-08 15:58:54 -07:00

kvm

…

linux

mm/page-writeback: introduce tracepoint for wait_on_page_writeback()

2019-05-14 09:47:51 -07:00

math-emu

…

media

Merge tag 'drm-next-2019-05-09' of git://anongit.freedesktop.org/drm/drm

2019-05-08 21:35:19 -07:00

memory

…

misc

ocxl: Provide global MMIO accessors for external drivers

2019-05-03 02:55:02 +10:00

net

net/tcp: use deferred jump label for TCP acked data hook

2019-05-09 11:13:57 -07:00

pcmcia

…

ras

…

rdma

RDMA: Add EFA related definitions

2019-05-06 13:47:50 -03:00

scsi

scsi: libsas: Inject revalidate event for root port event

2019-04-15 18:55:00 -04:00

soc

Merge tag 'mtd/for-5.2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mtd/linux

2019-05-12 17:57:52 -04:00

sound

Merge tag 'sound-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

2019-05-09 08:26:55 -07:00

target

scsi: target/iscsi: Handle too large immediate data buffers correctly

2019-04-12 20:20:06 -04:00

trace

mm/page-writeback: introduce tracepoint for wait_on_page_writeback()

2019-05-14 09:47:51 -07:00

uapi

fs/sync.c: sync_file_range(2) may use WB_SYNC_ALL writeback

2019-05-14 09:47:50 -07:00

video

udlfb: introduce a rendering mutex

2019-04-01 17:46:57 +02:00

xen

block: pass page to xen_biovec_phys_mergeable

2019-04-01 12:11:13 -06:00