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Filename Latest commit message Latest commit date
Tetsuo Handa 8236b0ae31 bdi: wake up concurrent wb_shutdown() callers. 
syzbot is reporting hung tasks at wait_on_bit(WB_shutting_down) in
wb_shutdown() [1]. This seems to be because commit 5318ce7d46 ("bdi:
Shutdown writeback on all cgwbs in cgwb_bdi_destroy()") forgot to call
wake_up_bit(WB_shutting_down) after clear_bit(WB_shutting_down).

Introduce a helper function clear_and_wake_up_bit() and use it, in order
to avoid similar errors in future.

[1] https://syzkaller.appspot.com/bug?id=b297474817af98d5796bc544e1bb806fc3da0e5e

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+c0cf869505e03bdf1a24@syzkaller.appspotmail.com>
Fixes: 5318ce7d46 ("bdi: Shutdown writeback on all cgwbs in cgwb_bdi_destroy()")
Cc: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-05-03 09:25:47 -06:00
arch RISC-V: build vdso-dummy.o with -no-pie 2018-04-24 10:54:46 -07:00
block blk-mq: fix sysfs inflight counter 2018-04-26 09:02:01 -06:00
certs
crypto
Documentation
drivers bcache: use pr_info() to inform duplicated CACHE_SET_IO_DISABLE set 2018-05-03 08:35:16 -06:00
firmware
fs
include bdi: wake up concurrent wb_shutdown() callers. 2018-05-03 09:25:47 -06:00
init
ipc
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-04-24 14:16:40 -07:00
lib dma-direct: don't retry allocation for no-op GFP_DMA 2018-04-23 14:43:27 +02:00
LICENSES
mm bdi: wake up concurrent wb_shutdown() callers. 2018-05-03 09:25:47 -06:00
net packet: fix bitfield update race 2018-04-24 13:17:08 -04:00
samples
scripts
security Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-04-24 17:58:51 -07:00
sound
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-04-24 14:16:40 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS for-linus-20180425 2018-04-25 21:05:15 -07:00
Makefile Linux 4.17-rc2 2018-04-22 19:20:09 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.