The patch titled
cleanup arch/i386/kernel/smpboot.c:smp_tune_scheduling()
has been added to the -mm tree. Its filename is
cleanup-arch-i386-kernel-smpbootcsmp_tune_scheduling.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: cleanup arch/i386/kernel/smpboot.c:smp_tune_scheduling()
From: Adrian Bunk <bunk@xxxxxxxxx>
- remove the write-only local variable "bandwidth"
- don't set "max_cache_size" in the (cachesize < 0) case:
that's already handled in kernel/sched.c:measure_migration_cost()
Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/i386/kernel/smpboot.c | 29 +++++------------------------
1 files changed, 5 insertions(+), 24 deletions(-)
diff -puN arch/i386/kernel/smpboot.c~cleanup-arch-i386-kernel-smpbootcsmp_tune_scheduling arch/i386/kernel/smpboot.c
--- a/arch/i386/kernel/smpboot.c~cleanup-arch-i386-kernel-smpbootcsmp_tune_scheduling
+++ a/arch/i386/kernel/smpboot.c
@@ -972,34 +972,15 @@ exit:
}
#endif
-static void smp_tune_scheduling (void)
+static void smp_tune_scheduling(void)
{
unsigned long cachesize; /* kB */
- unsigned long bandwidth = 350; /* MB/s */
- /*
- * Rough estimation for SMP scheduling, this is the number of
- * cycles it takes for a fully memory-limited process to flush
- * the SMP-local cache.
- *
- * (For a P5 this pretty much means we will choose another idle
- * CPU almost always at wakeup time (this is due to the small
- * L1 cache), on PIIs it's around 50-100 usecs, depending on
- * the cache size)
- */
- if (!cpu_khz) {
- /*
- * this basically disables processor-affinity
- * scheduling on SMP without a TSC.
- */
- return;
- } else {
+ if (cpu_khz) {
cachesize = boot_cpu_data.x86_cache_size;
- if (cachesize == -1) {
- cachesize = 16; /* Pentiums, 2x8kB cache */
- bandwidth = 100;
- }
- max_cache_size = cachesize * 1024;
+
+ if (cachesize > 0)
+ max_cache_size = cachesize * 1024;
}
}
_
Patches currently in -mm which might be from bunk@xxxxxxxxx are
origin.patch
make-drivers-acpi-baycdrive_bays-static.patch
make-drivers-acpi-eccec_ecdt-static.patch
drivers-acpi-oslc-fix-a-null-check.patch
git-alsa.patch
sound-soc-soc-dapmc-make-4-functions-static.patch
git-dvb.patch
git-gfs2-nmw.patch
fs-dlm-lowcomms-tcpc-remove-2-functions.patch
git-mtd.patch
make-drivers-mtd-cmdlinepartcmtdpart_setup-static.patch
git-net.patch
net-possible-cleanups.patch
net-possible-cleanups-fix.patch
net-possible-cleanups-fix-2.patch
net-uninline-skb_put-fix.patch
git-ocfs2.patch
git-scsi-misc.patch
drivers-scsi-small-cleanups.patch
drivers-scsi-aic7xxx-aic79xx_corec-make-ahd_match_scb-static.patch
drivers-scsi-advansysc-cleanups.patch
megaraid-fix-warnings-when-config_proc_fs=n.patch
drivers-scsi-dpt_i2oc-remove-dead-code.patch
drivers-scsi-aic7xxx-make-functions-static.patch
make-qla2x00_reg_remote_port-static.patch
arch-i386-kernel-remove-remaining-pc98-code.patch
cleanup-arch-i386-kernel-smpbootcsmp_tune_scheduling.patch
git-cryptodev.patch
make-mm-thrashcglobal_faults-static.patch
acx1xx-wireless-driver.patch
drivers-edac-make-code-static.patch
remove-drivers-pci-searchcpci_find_device_reverse.patch
ext4_ext_split-remove-dead-code.patch
the-scheduled-removal-of-some-oss-options.patch
make-mm-shmemcshmem_xattr_security_handler-static.patch
remove-kernel-lockdepclockdep_internal.patch
make-kernel-signalckill_proc_info-static.patch
make-ecryptfs_version_str_map-static.patch
make-fs-jbd-transactionc__journal_temp_unlink_buffer-static.patch
make-fs-jbd2-transactionc__jbd2_journal_temp_unlink_buffer-static.patch
fs-lockd-hostc-make-2-functions-static.patch
make-fs-proc-basecproc_pid_instantiate-static.patch
make-ext2_get_blocks-static.patch
generic-bug-implementation-include-linux-bugh-must-always-include-linux-moduleh.patch
drivers-mtd-nand-rtc_from4c-use-lib-bitrevc.patch
fsstack-introduce-fsstack_copy_attrinode_-fs-stackc-should-include-linux-fs_stackh.patch
i4l-remove-the-broken-hisax_amd7930-option.patch
readahead-events-accounting-make-readahead_debug_level-static.patch
reiser4-export-remove_from_page_cache-fix.patch
fs-reiser4-possible-cleanups.patch
reiser4-possible-cleanups-2.patch
fs-reiser4-possible-cleanups-2.patch
fs-reiser4-more-possible-cleanups.patch
make-drivers-md-dm-snapcksnapd-static.patch
gtod-persistent-clock-support-core-remove-kernel-timercwall_jiffies.patch
gtod-persistent-clock-support-i386-i386-unexport-read_persistent_clock.patch
dynticks-extend-next_timer_interrupt-to-use-a-reference-jiffie-make-kernel-timerc__next_timer_interrupt-static.patch
updated-i386-convert-to-clock-event-devices-arch-i386-kernel-apicc-make-a-function-static.patch
updated-i386-convert-to-clock-event-devices-remove-arch-i386-kernel-time_hpetchpet_reenable.patch
slim-main-patch-security-slim-slm_mainc-make-2-functions-static.patch
slab-cache-shrinker-statistics.patch
debug-shared-irqs-kconfig-fix.patch
i386-enable-4k-stacks-by-default.patch
mutex-subsystem-synchro-test-module.patch
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