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Filename Latest commit message Latest commit date
Luis Henriques a753e3f334 ceph: reduce contention in ceph_check_delayed_caps()
commit bf2ba432213fade50dd39f2e348085b758c0726e upstream.

Function ceph_check_delayed_caps() is called from the mdsc->delayed_work
workqueue and it can be kept looping for quite some time if caps keep
being added back to the mdsc->cap_delay_list.  This may result in the
watchdog tainting the kernel with the softlockup flag.

This patch breaks this loop if the caps have been recently (i.e. during
the loop execution).  Any new caps added to the list will be handled in
the next run.

Also, allow schedule_delayed() callers to explicitly set the delay value
instead of defaulting to 5s, so we can ensure that it runs soon
afterward if it looks like there is more work.

Cc: stable@vger.kernel.org
URL: https://tracker.ceph.com/issues/46284
Signed-off-by: Luis Henriques <lhenriques@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-18 08:56:57 +02:00
arch KVM: X86: MMU: Use the correct inherited permissions to get shadow page 2021-08-15 13:08:04 +02:00
block
certs
crypto
Documentation KVM: X86: MMU: Use the correct inherited permissions to get shadow page 2021-08-15 13:08:04 +02:00
drivers i2c: dev: zero out array used for i2c reads from userspace 2021-08-18 08:56:56 +02:00
fs ceph: reduce contention in ceph_check_delayed_caps() 2021-08-18 08:56:57 +02:00
include tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flag 2021-08-15 13:08:02 +02:00
init
ipc
kernel tracing: Reject string operand in the histogram expression 2021-08-15 13:08:02 +02:00
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sound ASoC: intel: atom: Fix reference to PCM buffer address 2021-08-18 08:56:56 +02:00
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Makefile Linux 5.4.141 2021-08-15 13:08:06 +02:00
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.

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.