AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2025-03-11 23:27:42 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
740,837 Commits 1 Branch 0 Tags 2 GiB
C 97.7%
Assembly 1.2%
Shell 0.3%
Makefile 0.3%
Python 0.2%
Other 0.1%
bf66337140
Go to file
Eric Dumazet bf66337140 inet: frags: get rid of ipfrag_skb_cb/FRAG_CB 
ip_defrag uses skb->cb[] to store the fragment offset, and unfortunately
this integer is currently in a different cache line than skb->next,
meaning that we use two cache lines per skb when finding the insertion point.

By aliasing skb->ip_defrag_offset and skb->dev, we pack all the fields
in a single cache line and save precious memory bandwidth.

Note that after the fast path added by Changli Gao in commit
d6bebca92c ("fragment: add fast path for in-order fragments")
this change wont help the fast path, since we still need
to access prev->len (2nd cache line), but will show great
benefits when slow path is entered, since we perform
a linear scan of a potentially long list.

Also, note that this potential long list is an attack vector,
we might consider also using an rb-tree there eventually.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-03-31 23:25:40 -04:00
arch
block
certs
crypto
Documentation inet: frags: break the 2GB limit for frags storage 2018-03-31 23:25:39 -04:00
drivers bnxt_en: Add ULP calls to stop and restart IRQs. 2018-03-31 23:24:20 -04:00
firmware
fs rxrpc, afs: Use debug_ids rather than pointers in traces 2018-03-27 23:03:00 +01:00
include inet: frags: get rid of ipfrag_skb_cb/FRAG_CB 2018-03-31 23:25:40 -04:00
init
ipc
kernel net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
lib rhashtable: add schedule points 2018-03-31 23:25:39 -04:00
LICENSES
mm
net inet: frags: get rid of ipfrag_skb_cb/FRAG_CB 2018-03-31 23:25:40 -04:00
samples
scripts
security security: Remove rtnl_lock() in selinux_xfrm_notify_policyload() 2018-03-29 13:47:53 -04:00
sound
tools tc-testing: Add newline when writing test case files 2018-03-30 14:22:51 -04:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: Update my email address from freescale to nxp 2018-03-30 12:57:13 -04:00
Makefile
README

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.