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Jakub Kicinski 8e4c62c7d9 page_pool: add DMA_ATTR_WEAK_ORDERING on all mappings
Commit c519fe9a4f ("bnxt: add dma mapping attributes") added
DMA_ATTR_WEAK_ORDERING to DMA attrs on bnxt. It has since spread
to a few more drivers (possibly as a copy'n'paste).

DMA_ATTR_WEAK_ORDERING only seems to matter on Sparc and PowerPC/cell,
the rarity of these platforms is likely why we never bothered adding
the attribute in the page pool, even though it should be safe to add.

To make the page pool migration in drivers which set this flag less
of a risk (of regressing the precious sparc database workloads or
whatever needed this) let's add DMA_ATTR_WEAK_ORDERING on all
page pool DMA mappings.

We could make this a driver opt-in but frankly I don't think it's
worth complicating the API. I can't think of a reason why device
accesses to packet memory would have to be ordered.

Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/r/20230417152805.331865-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-04-19 11:28:15 -07:00
Documentation Documentation: LEDs: Describe good names for network LEDs 2023-04-19 12:59:16 +01:00
LICENSES
arch arm: mvebu: dt: Add PHY LED support for 370-rd WAN port 2023-04-19 12:59:16 +01:00
block
certs
crypto
drivers stmmac: fix changing mac address 2023-04-19 13:14:58 +01:00
fs Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-13 16:04:28 -07:00
include net: skbuff: hide nf_trace and ipvs_property 2023-04-19 13:04:30 +01:00
init
io_uring Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-13 16:04:28 -07:00
ipc
kernel bpf-next-for-netdev 2023-04-13 16:43:38 -07:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-04-13 16:04:28 -07:00
mm bpf-next-for-netdev 2023-04-13 16:43:38 -07:00
net page_pool: add DMA_ATTR_WEAK_ORDERING on all mappings 2023-04-19 11:28:15 -07:00
rust
samples bpf-next-for-netdev 2023-04-13 16:43:38 -07:00
scripts bpf-next-for-netdev 2023-04-13 16:43:38 -07:00
security
sound
tools selftests: mptcp: join: fix ShellCheck warnings 2023-04-17 08:25:33 +01:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS net: stmmac: Add glue layer for StarFive JH7110 SoC 2023-04-18 13:13:41 +02:00
Makefile
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.