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Bob Peterson 0be8432166 gfs2: Don't use filemap_splice_read 
Starting with patch 2cb1e08985, gfs2 started using the new function
filemap_splice_read rather than the old (and subsequently deleted)
function generic_file_splice_read.

filemap_splice_read works by taking references to a number of folios in
the page cache and splicing those folios into a pipe.  The folios are
then read from the pipe and the folio references are dropped.  This can
take an arbitrary amount of time.  We cannot allow that in gfs2 because
those folio references will pin the inode glock to the node and prevent
it from being demoted, which can lead to cluster-wide deadlocks.

Instead, use copy_splice_read.

(In addition, the old generic_file_splice_read called into ->read_iter,
which called gfs2_file_read_iter, which took the inode glock during the
operation.  The new filemap_splice_read interface does not take the
inode glock anymore.  This is fixable, but it still wouldn't prevent
cluster-wide deadlocks.)

Fixes: 2cb1e08985 ("splice: Use filemap_splice_read() instead of generic_file_splice_read()")
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2023-08-07 18:42:04 +02:00
arch arch/arm64/mm/fault: Fix undeclared variable error in do_page_fault() 2023-07-03 19:04:32 -07:00
block block-6.5-2023-07-03 2023-07-03 18:48:38 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto This update includes the following changes: 2023-06-30 21:27:13 -07:00
Documentation More power management updates for 6.5-rc1 2023-07-04 11:22:50 -07:00
drivers More power management updates for 6.5-rc1 2023-07-04 11:22:50 -07:00
fs gfs2: Don't use filemap_splice_read 2023-08-07 18:42:04 +02:00
include Another set of clk driver updates and fixes for the merge window. The 2023-07-04 11:07:45 -07:00
init Kbuild updates for v6.5 2023-07-01 09:24:31 -07:00
io_uring io_uring-6.5-2023-07-03 2023-07-03 18:43:10 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel module: fix init_module_from_file() error handling 2023-07-04 10:17:11 -07:00
lib Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm: don't do validate_mm() unnecessarily and without mmap locking 2023-07-04 07:22:59 -07:00
net - New Drivers 2023-07-03 11:26:05 -07:00
rust rust: error: impl Debug for Error with errname() integration 2023-06-13 01:24:42 +02:00
samples Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
scripts Char/Misc and other driver subsystem updates for 6.5-rc1 2023-07-03 12:46:47 -07:00
security powerpc updates for 6.5 2023-06-30 09:20:08 -07:00
sound ARM: SoC changes for 6.5 2023-06-29 15:28:33 -07:00
tools virtio: features, fixes, cleanups 2023-07-03 15:38:26 -07:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt ARM64: 2023-07-03 15:32:22 -07:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: implement CONFIG_TRIM_UNUSED_KSYMS without recursion 2023-06-22 21:21:06 +09:00
.mailmap - New Drivers 2023-07-03 10:55:04 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS power supply and reset changes for the 6.5 series 2023-07-03 17:23:16 -07:00
Makefile Kbuild updates for v6.5 2023-07-01 09:24:31 -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.

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.