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27 March 2024, 02:37:15 UTC
Revision 2dc91abe03d8ce6dd7f9251faffafca5f6b9e85d authored by Nick Piggin on 17 August 2010, 18:37:37 UTC, committed by Al Viro on 18 August 2010, 12:35:48 UTC 
lglock: introduce special lglock and brlock spin locks
 
lglock: introduce special lglock and brlock spin locks

This patch introduces "local-global" locks (lglocks). These can be used to:

- Provide fast exclusive access to per-CPU data, with exclusive access to
  another CPU's data allowed but possibly subject to contention, and to provide
  very slow exclusive access to all per-CPU data.
- Or to provide very fast and scalable read serialisation, and to provide
  very slow exclusive serialisation of data (not necessarily per-CPU data).

Brlocks are also implemented as a short-hand notation for the latter use
case.

Thanks to Paul for local/global naming convention.

Cc: linux-kernel@vger.kernel.org
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 parent d996b62
Raw File
Tip revision: 2dc91abe03d8ce6dd7f9251faffafca5f6b9e85d authored by Nick Piggin on 17 August 2010, 18:37:37 UTC
lglock: introduce special lglock and brlock spin locks
Tip revision: 2dc91ab
command-list.txt 
#
# List of known perf commands.
# command name			category [deprecated] [common]
#
perf-annotate			mainporcelain common
perf-archive			mainporcelain common
perf-bench			mainporcelain common
perf-buildid-cache		mainporcelain common
perf-buildid-list		mainporcelain common
perf-diff			mainporcelain common
perf-inject			mainporcelain common
perf-list			mainporcelain common
perf-sched			mainporcelain common
perf-record			mainporcelain common
perf-report			mainporcelain common
perf-stat			mainporcelain common
perf-timechart			mainporcelain common
perf-top			mainporcelain common
perf-trace			mainporcelain common
perf-probe			mainporcelain common
perf-kmem			mainporcelain common
perf-lock			mainporcelain common
perf-kvm			mainporcelain common
perf-test			mainporcelain common
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