| commit | ac8be955049dab828a68b9c68a75144832f8289f | |
| author | Ralf Baechle <ralf@linux-mips.org> | |
| Sat, 20 Jan 2007 00:18:01 +0000 (20 00:18 +0000) | ||
| committer | Ralf Baechle <ralf@linux-mips.org> | |
| Tue, 23 Jan 2007 18:26:47 +0000 (23 18:26 +0000) | ||
| tree | c9992cccbc6bcb2f099395ef614ebc96b91a2598 | treesnapshot (tar.gz zip) |
| parent | 9ee79a3d372fcb6729893437f4923c5efd1f85db | commitdiff |
[MIPS] SMTC: Instant IPI replay.
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>
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>
| arch/mips/Kconfig | diffblobblamehistory | |
| arch/mips/kernel/smtc.c | diffblobblamehistory | |
| include/asm-mips/irqflags.h | diffblobblamehistory |