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Filename Latest commit message Latest commit date
Matthew Bobrowski 339a860cdd ext4: update direct I/O read lock pattern for IOCB_NOWAIT
[ Upstream commit 548feebec7e93e58b647dba70b3303dcb569c914 ]

This patch updates the lock pattern in ext4_direct_IO_read() to not
block on inode lock in cases of IOCB_NOWAIT direct I/O reads. The
locking condition implemented here is similar to that of 942491c9e6
("xfs: fix AIM7 regression").

Fixes: 16c5468859 ("ext4: Allow parallel DIO reads")
Signed-off-by: Matthew Bobrowski <mbobrowski@mbobrowski.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/c5d5e759f91747359fbd2c6f9a36240cf75ad79f.1572949325.git.mbobrowski@mbobrowski.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-04 19:17:13 +01:00
arch powerpc/book3s64/hash: Add cond_resched to avoid soft lockup warning 2020-01-04 19:17:12 +01:00
block
certs
crypto
Documentation
drivers clocksource/drivers/timer-of: Use unique device name instead of timer 2020-01-04 19:17:08 +01:00
fs ext4: update direct I/O read lock pattern for IOCB_NOWAIT 2020-01-04 19:17:13 +01:00
include dma-mapping: fix handling of dma-ranges for reserved memory (again) 2020-01-04 19:17:00 +01:00
init
ipc
kernel dma-mapping: fix handling of dma-ranges for reserved memory (again) 2020-01-04 19:17:00 +01:00
lib
LICENSES
mm
net
samples
scripts dtc: Use pkg-config to locate libyaml 2020-01-04 19:17:09 +01:00
security
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tools selftests/powerpc: Skip tm-signal-sigreturn-nt if TM not available 2020-01-04 19:17:10 +01:00
usr
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Makefile Linux 5.4.7 2019-12-31 16:46:36 +01:00
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.