26 Nov, 2009
1 commit
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Limit the number of per cpu calibration messages by only
printing out results for the first cpu to boot.Also, don't print "CPUx is down" as this is expected, and we
don't need 4096 reminders... ;-)Signed-off-by: Mike Travis
Cc: Heiko Carstens
Cc: Roland Dreier
Cc: Randy Dunlap
Cc: Tejun Heo
Cc: Andi Kleen
Cc: Greg Kroah-Hartman
Cc: Yinghai Lu
Cc: David Rientjes
Cc: Steven Rostedt
Cc: Rusty Russell
Cc: Hidetoshi Seto
Cc: Jack Steiner
Cc: Frederic Weisbecker
LKML-Reference:
Signed-off-by: Ingo Molnar
28 Jul, 2008
1 commit
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Rabin Vincent noticed that there's a stray in BogoMIPS printk:
> Remove the extra KERN_INFO which causes this:
> Calibrating delay loop... 179.40 BogoMIPS (lpj=897024)
> - printk(KERN_INFO "%lu.%02lu BogoMIPS (lpj=%lu)\n",
> - loops_per_jiffy/(500000/HZ),
> - (loops_per_jiffy/(5000/HZ)) % 100, loops_per_jiffy);
> + printk("%lu.%02lu BogoMIPS (lpj=%lu)\n",
> + loops_per_jiffy/(500000/HZ),
> + (loops_per_jiffy/(5000/HZ)) % 100, loops_per_jiffy);
> }How about just using KERN_CONT and leaving the whitespace
for a patch that does the entire file?Reported-by: Rabin Vincent
24 Jun, 2008
2 commits
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As suggested by Ingo, remove all references to tsc from init/calibrate.c
TSC is x86 specific, and using tsc in variable names in a generic file should
be avoided. lpj_tsc is now called lpj_fine, since it is related to fine tuning
of lpj value. Also tsc_rate_* is called timer_rate_*Signed-off-by: Alok N Kataria
Cc: Arjan van de Ven
Cc: Daniel Hecht
Cc: Tim Mann
Cc: Zach Amsden
Cc: Sahil Rihan
Signed-off-by: Ingo Molnar -
On the x86 platform we can use the value of tsc_khz computed during tsc
calibration to calculate the loops_per_jiffy value. Its very important
to keep the error in lpj values to minimum as any error in that may
result in kernel panic in check_timer. In virtualization environment, On
a highly overloaded host the guest delay calibration may sometimes
result in errors beyond the ~50% that timer_irq_works can handle,
resulting in the guest panicking.Does some formating changes to lpj_setup code to now have a single
printk to print the bogomips value.We do this only for the boot processor because the AP's can have
different base frequencies or the BIOS might boot a AP at a different
frequency.Signed-off-by: Alok N Kataria
Cc: Arjan van de Ven
Cc: Daniel Hecht
Cc: Tim Mann
Cc: Zach Amsden
Cc: Sahil Rihan
Signed-off-by: Ingo Molnar
07 Feb, 2008
2 commits
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calibrate_delay() must be __cpuinit, not __{dev,}init.
I've verified that this is correct for all users.
While doing the latter, I also did the following cleanups:
- remove pointless additional prototypes in C files
- ensure all users #includeThis fixes the following section mismatches with CONFIG_HOTPLUG=n,
CONFIG_HOTPLUG_CPU=y:WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder')
WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map')Signed-off-by: Adrian Bunk
Cc: Ivan Kokshaysky
Cc: Richard Henderson
Cc: "Luck, Tony"
Cc: Ralf Baechle
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: "David S. Miller"
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Christian Zankel
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- All implementations can be __devinit
- The function prototypes were in asm/timex.h but they all must be the same,
so create a single declaration in linux/timex.h.- uninline the sparc64 version to match the other architectures
- Don't bother #defining ARCH_HAS_READ_CURRENT_TIMER to a particular value.
[ezk@cs.sunysb.edu: fix build]
Cc: "David S. Miller"
Cc: Haavard Skinnemoen
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
1 commit
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Optionally add a boot delay after each kernel printk() call, crudely
measured in milliseconds, with a maximum delay of 10 seconds per printk.Enable CONFIG_BOOT_PRINTK_DELAY=y and then add (e.g.):
"lpj=loops_per_jiffy boot_delay=100"
to the kernel command line.It has been useful in cases like "during boot, my machine just reboots or the
screen goes black" by slowing down printk, (and adding initcall_debug), we can
usually see the last thing that happened before the lights went out which is
usually a valuable clue.[akpm@linux-foundation.org: not all architectures implement CONFIG_HZ]
[akpm@linux-foundation.org: fix lots of stuff]
[bunk@stusta.de: kernel/printk.c: make 2 variables static]
[heiko.carstens@de.ibm.com: fix slow down printk on boot compile error]
Signed-off-by: Randy Dunlap
Signed-off-by: Dave Jones
Signed-off-by: Adrian Bunk
Signed-off-by: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Feb, 2007
1 commit
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After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there. Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm. I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).Signed-off-by: Tim Schmielau
Acked-by: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
