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A mirror of the official Linux kernel repository just in case
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Dylan Yudaken 4ab9d46507 io_uring: allow buffer recycling in READV 
In commit 934447a603 ("io_uring: do not recycle buffer in READV") a
temporary fix was put in io_kbuf_recycle to simply never recycle READV
buffers.

Instead of that, rather treat READV with REQ_F_BUFFER_SELECTED the same as
a READ with REQ_F_BUFFER_SELECTED. Since READV requires iov_len of 1 they
are essentially the same.
In order to do this inside io_prep_rw() add some validation to check that
it is in fact only length 1, and also extract the length of the buffer at
prep time.

This allows removal of the io_iov_buffer_select codepaths as they are only
used from the READV op.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220907165152.994979-1-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-21 10:30:43 -06:00
arch parisc: Allow CONFIG_64BIT with ARCH=parisc 2022-09-15 07:59:37 +02:00
block block: export blk_rq_is_poll 2022-09-21 10:30:42 -06:00
certs Kbuild updates for v5.20 2022-08-10 10:40:41 -07:00
crypto crypto: blake2b: effectively disable frame size warning 2022-08-10 17:59:11 -07:00
Documentation Devicetree fixes for v6.0, take 2: 2022-09-14 10:22:39 +01:00
drivers fs: add batch and poll flags to the uring_cmd_iopoll() handler 2022-09-21 10:30:43 -06:00
fs eventfd: guard wake_up in eventfd fs calls as well 2022-09-21 10:30:42 -06:00
include fs: add batch and poll flags to the uring_cmd_iopoll() handler 2022-09-21 10:30:43 -06:00
init arm64 fixes for -rc3 2022-08-26 11:32:53 -07:00
io_uring io_uring: allow buffer recycling in READV 2022-09-21 10:30:43 -06:00
ipc Updates to various subsystems which I help look after. lib, ocfs2, 2022-08-07 10:03:24 -07:00
kernel dma-mapping fixes for Linux 6.0 2022-09-10 12:18:19 -04:00
lib This push fixes a boot performance regression due to an unnecessary 2022-08-31 09:47:06 -07:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm: pagewalk: Fix race between unmap and page walker 2022-09-03 10:13:13 -07:00
net NFS client bugfixes for Linux 6.0 2022-09-12 17:53:46 -04:00
samples Tracing updates for 5.20 / 6.0 2022-08-05 09:41:12 -07:00
scripts Kbuild fixes for v6.0 (2nd) 2022-09-11 15:16:47 -04:00
security Landlock fix for v6.0-rc4 2022-09-02 15:24:08 -07:00
sound ASoC: Fixes for v6.0 2022-09-08 14:24:05 +02:00
tools parisc architecture fixes for kernel v6.0-rc6: 2022-09-18 13:26:59 -07:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: Drop unnecessary initialization of "ops" in kvm_ioctl_create_device() 2022-08-19 04:05:43 -04:00
.clang-format PCI/DOE: Add DOE mailbox support functions 2022-07-19 15:38:04 -07:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes
.gitignore kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap Devicetree fixes for v6.0, take 2: 2022-09-14 10:22:39 +01:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS drm for 5.20/6.0 2022-08-03 19:52:08 -07:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS gpio fixes for v6.0-rc6 2022-09-16 12:58:17 -07:00
Makefile Linux 6.0-rc6 2022-09-18 13:44:14 -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.