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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2011-08-25 12:01:12 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-09-21 10:26:26 +0200 |
| commit | e57253a81d9cc7049e9e43bd806ce6cdd297ec1c (patch) | |
| tree | 979900bd7e7fe8fd60e28fcd79b2652bd92fa84a /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 1e75b31d638d5242ca8e9771dfdcbd28a5f041df (diff) | |
| download | kernel-e57253a81d9cc7049e9e43bd806ce6cdd297ec1c.tar.gz | |
x86, ioapic: Restore the mask bit correctly in eoi_ioapic_irq()
For older IO-APIC's, we were clearing the remote-IRR by changing
the RTE trigger mode to edge and then back to level. We wanted
to mask the RTE during this process, so we were essentially
doing mask+edge and then to unmask+level.
As part of the commit ca64c47cecd0321b2e0dcbd7aaff44b68ce20654,
we moved this EOI process earlier where the IO-APIC RTE is
masked. So we were wrongly unmasking it in the eoi_ioapic_irq().
So change the remote-IRR clear sequence in eoi_ioapic_irq() to
mask + edge and then restore the previous RTE entry which will
restore the mask status as well as the level trigger.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Thomas Renninger <trenn@suse.de>
Cc: Rafael Wysocki <rjw@novell.com>
Cc: lchiquitto@novell.com
Cc: jbeulich@novell.com
Cc: yinghai@kernel.org
Link: http://lkml.kernel.org/r/20110825190657.210286410@sbsiddha-desk.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions