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authorNick Piggin <npiggin@kernel.dk>2010-08-18 04:37:37 +1000
committerAl Viro <viro@zeniv.linux.org.uk>2010-08-18 08:35:48 -0400
commit2dc91abe03d8ce6dd7f9251faffafca5f6b9e85d (patch)
tree1712fcb512310a80a7d2c7f92b30ce91750efaf1 /security
parentd996b62a8df1d935b01319bf8defb95b5709f7b8 (diff)
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>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions

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