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| author | Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> | 2008-01-25 21:08:00 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-25 21:08:00 +0100 |
| commit | a183561567b5446d3362b4839bd4f744f4b2af1e (patch) | |
| tree | 7bfa46fd0bf4a96e96500732d188f1ef4b04454d /kernel/sched_fair.c | |
| parent | 58e2d4ca581167c2a079f4ee02be2f0bc52e8729 (diff) | |
| download | linux-a183561567b5446d3362b4839bd4f744f4b2af1e.tar.gz linux-a183561567b5446d3362b4839bd4f744f4b2af1e.tar.bz2 linux-a183561567b5446d3362b4839bd4f744f4b2af1e.zip | |
sched: introduce a mutex and corresponding API to serialize access to doms_curarray
doms_cur[] array represents various scheduling domains which are
mutually exclusive. Currently cpusets code can modify this array (by
calling partition_sched_domains()) as a result of user modifying
sched_load_balance flag for various cpusets.
This patch introduces a mutex and corresponding API (only when
CONFIG_FAIR_GROUP_SCHED is defined) which allows a reader to safely read
the doms_cur[] array w/o worrying abt concurrent modifications to the
array.
The fair group scheduler code (introduced in next patch of this series)
makes use of this mutex to walk thr' doms_cur[] array while rebalancing
shares of task groups across cpus.
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
0 files changed, 0 insertions, 0 deletions