Skip to main content

Browse the archive

https://github.com/torvalds/linux
05 April 2024, 19:05:47 UTC
Revision b89aa12c177477e34caa722818536fb5d0bffd76 authored by Vineet Gupta on 21 July 2015, 15:46:53 UTC, committed by Vineet Gupta on 04 August 2015, 03:56:35 UTC 
ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle
 
The previous commit for delayed retry of SCOND needs some fine tuning
for spin locks.

The backoff from delayed retry in conjunction with spin looping of lock
itself can potentially cause the delay counter to reach high values.
So to provide fairness to any lock operation, after a lock "seems"
available (i.e. just before first SCOND try0, reset the delay counter
back to starting value of 1

Essentially reset delay to 1 for a new spin-wait-loop-acquire cycle.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
1 parent e78fdfe
History
Tip revision: b89aa12c177477e34caa722818536fb5d0bffd76 authored by Vineet Gupta on 21 July 2015, 15:46:53 UTC
ARCv2: spinlock/rwlock: Reset retry delay when starting a new spin-wait cycle
Tip revision: b89aa12
File Mode Size
Documentation
arch
block
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.gitignore -rw-r--r-- 1.2 KB
.mailmap -rw-r--r-- 5.3 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 94.7 KB
Kbuild -rw-r--r-- 2.6 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 313.1 KB
Makefile -rw-r--r-- 53.1 KB
README -rw-r--r-- 18.2 KB
REPORTING-BUGS -rw-r--r-- 7.3 KB

README

back to top