https://github.com/torvalds/linux
Revision ac8be955049dab828a68b9c68a75144832f8289f authored by Ralf Baechle on 20 January 2007, 00:18:01 UTC, committed by Ralf Baechle on 23 January 2007, 18:26:47 UTC
SMTC pseudo-interrupts between TCs are deferred and queued if the target
TC is interrupt-inhibited (IXMT). In the first SMTC prototypes, these
queued IPIs were serviced on return to user mode, or on entry into the
kernel idle loop. The INSTANT_REPLAY option dispatches them as part of
local_irq_restore() processing, which adds runtime overhead (hence the
option to turn it off), but ensures that IPIs are handled promptly even
under heavy I/O interrupt load.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent 9ee79a3
History
Tip revision: ac8be955049dab828a68b9c68a75144832f8289f authored by Ralf Baechle on 20 January 2007, 00:18:01 UTC
[MIPS] SMTC: Instant IPI replay.
Tip revision: ac8be95
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