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Filename Latest commit message Latest commit date
Nicholas Nunley 00b0f7d9d4 i40e: initialize ITRN registers with correct values 
[ Upstream commit 998e5166e604fd37afe94352f7b8c2d816b11049 ]

Since commit 92418fb147 ("i40e/i40evf: Use usec value instead of reg
value for ITR defines") the driver tracks the interrupt throttling
intervals in single usec units, although the actual ITRN/ITR0 registers are
programmed in 2 usec units. Most register programming flows in the driver
correctly handle the conversion, although it is currently not applied when
the registers are initialized to their default values. Most of the time
this doesn't present a problem since the default values are usually
immediately overwritten through the standard adaptive throttling mechanism,
or updated manually by the user, but if adaptive throttling is disabled and
the interval values are left alone then the incorrect value will persist.

Since the intended default interval of 50 usecs (vs. 100 usecs as
programmed) performs better for most traffic workloads, this can lead to
performance regressions.

This patch adds the correct conversion when writing the initial values to
the ITRN registers.

Signed-off-by: Nicholas Nunley <nicholas.d.nunley@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-31 16:44:22 +01:00
arch arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill() 2019-12-31 16:44:21 +01:00
block block: fix "check bi_size overflow before merge" 2019-12-21 11:04:32 +01:00
certs
crypto crypto: aegis128/simd - build 32-bit ARM for v8 architecture explicitly 2019-12-31 16:43:57 +01:00
Documentation USB: documentation: flags on usb-storage versus UAS 2019-12-17 19:55:32 +01:00
drivers i40e: initialize ITRN registers with correct values 2019-12-31 16:44:22 +01:00
fs Btrfs: fix removal logic of the tree mod log that leads to use-after-free issues 2019-12-31 16:42:07 +01:00
include ipmi: Don't allow device module unload when in use 2019-12-31 16:44:14 +01:00
init Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
kernel bpf/stackmap: Fix deadlock with rq_lock in bpf_get_stack() 2019-12-31 16:44:09 +01:00
lib lib: raid6: fix awk build warnings 2019-12-17 19:56:09 +01:00
LICENSES
mm mm/shmem.c: cast the type of unmap_start to u64 2019-12-17 19:56:51 +01:00
net Bluetooth: hci_core: fix init for HCI_USER_CHANNEL 2019-12-31 16:44:09 +01:00
samples samples: pktgen: fix proc_cmd command result check logic 2019-12-31 16:43:45 +01:00
scripts arm64 fix for -rc8 / final 2019-11-15 09:14:23 -08:00
security efi/efi_test: Lock down /dev/efi_test and require CAP_SYS_ADMIN 2019-10-31 09:40:21 +01:00
sound ASoC: soc-pcm: fixup dpcm_prune_paths() loop continue 2019-12-31 16:44:13 +01:00
tools selftests/bpf: Make a copy of subtest name 2019-12-31 16:44:12 +01:00
usr kbuild: update compile-test header list for v5.4-rc2 2019-10-05 15:29:49 +09:00
virt KVM: arm/arm64: vgic: Don't rely on the wrong pending table 2019-12-13 08:43:00 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild
Kconfig
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-11-22 14:28:14 -08:00
Makefile Linux 5.4.6 2019-12-21 11:05:23 +01:00
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.