This is a note to let you know that I've just added the patch titled
sparc: Don't do expensive hypervisor PCR write unless necessary.
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc-don-t-do-expensive-hypervisor-pcr-write-unless-necessary.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@kernel.org> know about it.
>From 25d49bec974117ae1ddb5cd5bfaae549281abea9 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <da...@davemloft.net>
Date: Wed, 27 Jul 2011 20:46:25 -0700
Subject: sparc: Don't do expensive hypervisor PCR write unless necessary.
From: "David S. Miller" <da...@davemloft.net>
[ Upstream commit 314ff52727fe94dfbe07f3a9a489ab3ca8d8df5a ]
The hypervisor call is only necessary if hypervisor events are
being requested.
So if we're not tracking hypervisor events, simply do a direct
register write.
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
arch/sparc/kernel/pcr.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -80,8 +80,11 @@ static void n2_pcr_write(u64 val)
{
unsigned long ret;
- ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
- if (ret != HV_EOK)
+ if (val & PCR_N2_HTRACE) {
+ ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
+ if (ret != HV_EOK)
+ write_pcr(val);
+ } else
write_pcr(val);
}
Patches currently in stable-queue which might be from da...@davemloft.net are
queue-3.0/ipv4-send-gratuitous-arp-for-secondary-ip-addresses-also.patch
queue-3.0/ipv4-constrain-ufo-fragment-sizes-to-multiples-of-8-bytes.patch
queue-3.0/sparc-detect-and-handle-ultrasparc-t3-cpu-types.patch
queue-3.0/bonding-fix-string-comparison-errors.patch
queue-3.0/sparc-use-popc-if-possible-for-hweight-routines.patch
queue-3.0/drivers-net-niu.c-adjust-array-index.patch
queue-3.0/sparc-set-reboot-cmd-using-reboot-data-hypervisor-call-if-available.patch
queue-3.0/net-audit-drivers-to-identify-those-needing-iff_tx_skb_sharing-cleared.patch
queue-3.0/sparc-size-mondo-queues-more-sanely.patch
queue-3.0/sparc-don-t-leave-sparc_pmu_type-null-on-sun4v.patch
queue-3.0/ipv4-use-rt_tos-after-some-rt_tos-conversions.patch
queue-3.0/net-cap-number-of-elements-for-sendmmsg.patch
queue-3.0/sch_sfq-fix-sfq_enqueue.patch
queue-3.0/sparc-sanitize-cpu-feature-detection-and-reporting.patch
queue-3.0/sparc-use-popc-when-possible-for-ffs-__ffs-ffz.patch
queue-3.0/sparc-add-t3-sun4v-cpu-type-and-hypervisor-group-defines.patch
queue-3.0/net-fix-security_socket_sendmsg-bypass-problem.patch
queue-3.0/sparc-use-hweight64-in-popc-emulation.patch
queue-3.0/0002-net-Compute-protocol-sequence-numbers-and-fragment-I.patch
queue-3.0/sparc-add-some-missing-hypervisor-api-groups.patch
queue-3.0/fix-cdc-phonet-build.patch
queue-3.0/sparc-minor-tweaks-to-niagara-page-copy-clear.patch
queue-3.0/ipv4-fix-the-reusing-of-routing-cache-entries.patch
queue-3.0/ipv6-make-fragment-identifications-less-predictable.patch
queue-3.0/sis190-rx-filter-init-is-needed-for-mac-address-change.patch
queue-3.0/net-adjust-array-index.patch
queue-3.0/sparc-access-kernel-tsb-using-physical-addressing-when-possible.patch
queue-3.0/net-allow-netif_carrier-to-be-called-safely-from-irq.patch
queue-3.0/sparc-fix-build-with-debug_pagealloc-enabled.patch
queue-3.0/icmp-fix-regression-in-nexthop-resolution-during-replies.patch
queue-3.0/xfrm-fix-key-lengths-for-rfc3686-ctr-aes.patch
queue-3.0/0001-crypto-Move-md5_transform-to-lib-md5.c.patch
queue-3.0/gre-fix-improper-error-handling.patch
queue-3.0/net-add-iff_skb_tx_shared-flag-to-priv_flags.patch
queue-3.0/r8169-add-support-for-d-link-530t-rev-c1-kernel-bug-38862.patch
queue-3.0/sparc-don-t-do-expensive-hypervisor-pcr-write-unless-necessary.patch
queue-3.0/net-sendmmsg-should-only-return-an-error-if-no-messages-were-sent.patch
queue-3.0/mpt2sas-fixed-big-indian-issues-on-32-bit-ppc.patch
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