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Omar Sandoval 8c7d9fe06f btrfs: send: avoid copying file data
send_write() currently copies from the page cache to sctx->read_buf, and
then from sctx->read_buf to sctx->send_buf. Similarly, send_hole()
zeroes sctx->read_buf and then copies from sctx->read_buf to
sctx->send_buf. However, if we write the TLV header manually, we can
copy to sctx->send_buf directly and get rid of sctx->read_buf.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2020-10-07 12:13:17 +02:00
arch Two bugfix patches. 2020-10-03 12:19:23 -07:00
block block-5.9-2020-10-02 2020-10-02 14:34:52 -07:00
certs
crypto
Documentation Power management fixes for 5.9-rc8 2020-10-02 10:05:56 -07:00
drivers xen: branch for v5.9-rc8 2020-10-03 11:57:39 -07:00
fs btrfs: send: avoid copying file data 2020-10-07 12:13:17 +02:00
include btrfs: make ordered extent tracepoint take btrfs_inode 2020-10-07 12:12:17 +02:00
init
ipc
kernel
lib
LICENSES
mm mm/page_alloc: handle a missing case for memalloc_nocma_{save/restore} APIs 2020-10-03 11:28:12 -07:00
net
samples
scripts scripts/spelling.txt: fix malformed entry 2020-10-03 11:28:12 -07:00
security
sound
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS pci-v5.9-fixes-2 2020-10-02 14:48:25 -07:00
Makefile Linux 5.9-rc8 2020-10-04 16:04:34 -07:00
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.