From: Ralf Baechle <ralf@linux-mips.org>
Date: Sat, 20 Jan 2007 00:18:01 +0000 (+0000)
Subject: [MIPS] SMTC: Instant IPI replay.
X-Git-Tag: v2.6.20-rc6~16^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac8be955049dab828a68b9c68a75144832f8289f;p=pandora-kernel.git

[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>
---

Reading git-diff-tree failed