AuxXxilium/linux_dsm_epyc7002
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9e35ad388b
linux_dsm_epyc7002/arch
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Peter Zijlstra 9e35ad388b perf_counter: Rework the perf counter disable/enable 
The current disable/enable mechanism is:

	token = hw_perf_save_disable();
	...
	/* do bits */
	...
	hw_perf_restore(token);

This works well, provided that the use nests properly. Except we don't.

x86 NMI/INT throttling has non-nested use of this, breaking things. Therefore
provide a reference counter disable/enable interface, where the first disable
disables the hardware, and the last enable enables the hardware again.

[ Impact: refactor, simplify the PMU disable/enable logic ]

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-15 09:47:02 +02:00
..
alpha alpha: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
arm arm: Use __INIT macro instead of .text.init. 2009-04-27 19:51:58 -07:00
avr32 clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
blackfin clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
cris tty: Use the generic RS485 ioctl on CRIS 2009-04-07 08:44:05 -07:00
frv FRV: Use __INIT macro instead of .text.init. 2009-04-27 19:46:30 -07:00
h8300 Get rid of final remnants of include/asm-$(ARCH) 2009-04-17 09:59:27 -07:00
ia64 KVM: ia64: fix locking order entering guest 2009-04-22 13:52:09 +03:00
m32r m32r: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
m68k m68k: arch/m68k/kernel/sun3-head.S needs <linux/init.h> 2009-04-28 16:07:18 -07:00
m68knommu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2009-04-24 08:45:53 -07:00
microblaze microblaze: add parameter to microblaze_read() 2009-04-23 16:27:38 +02:00
mips clocksource: pass clocksource to read() callback 2009-04-21 13:41:47 -07:00
mn10300 mn10300: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
parisc Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6 2009-04-03 09:52:04 -07:00
powerpc perf_counter: Rework the perf counter disable/enable 2009-05-15 09:47:02 +02:00
s390 s390: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:39 -07:00
sh sh: Use __INIT macro instead of .text.init. 2009-04-27 19:51:58 -07:00
sparc sparc: cleanup references to deprecated .text.init* sections. 2009-04-27 19:51:58 -07:00
um uml: kill a kconfig warning 2009-04-21 13:41:50 -07:00
x86 perf_counter: Rework the perf counter disable/enable 2009-05-15 09:47:02 +02:00
xtensa xtensa: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
.gitignore
Kconfig mutex: have non-spinning mutexes on s390 by default 2009-04-09 19:28:24 +02:00