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f1c39625d6
linux/arch/x86/xen
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Jeremy Fitzhardinge f1c39625d6 xen: use non-tracing preempt in xen_clocksource_read() 
The tracing code used sched_clock() to get tracing timestamps, which
ends up calling xen_clocksource_read().  xen_clocksource_read() must
disable preemption, but if preemption tracing is enabled, this results
in infinite recursion.

I've only noticed this when boot-time tracing tests are enabled, but it
seems like a generic bug.  It looks like it would also affect
kvm_clocksource_read().

Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
2011-08-24 09:54:24 -07:00
..
debugfs.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
debugfs.h xen: add debugfs support 2008-08-21 13:52:58 +02:00
enlighten.c Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-08-22 11:25:44 -07:00
grant-table.c xen: make grant table arch portable 2008-04-24 23:57:32 +02:00
irq.c arch/x86/xen/irq: Cleanup code/data sections definitions 2011-05-12 17:19:33 -04:00
Kconfig fix XEN_SAVE_RESTORE Kconfig dependencies 2011-04-11 22:54:48 +02:00
Makefile xen/tracing: Fix tracing config option properly 2011-08-22 11:28:33 -04:00
mmu.c Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-08-22 11:25:44 -07:00
mmu.h xen: make a pile of mmu pvop functions static 2011-05-20 14:25:24 -07:00
multicalls.c xen/multicall: move *idx fields to start of mc_buffer 2011-07-18 15:43:46 -07:00
multicalls.h xen/trace: add multicall tracing 2011-07-18 15:43:26 -07:00
p2m.c Merge branches 'stable/irq', 'stable/p2m.bugfixes', 'stable/e820.bugfixes' and 'stable/mmu.bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-05-19 16:14:58 -07:00
pci-swiotlb-xen.c treewide: fix a few typos in comments 2011-05-10 10:16:21 +02:00
platform-pci-unplug.c xen:pvhvm: Modpost section mismatch fix 2011-07-11 13:37:04 -04:00
setup.c Merge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-08-06 12:22:30 -07:00
smp.c xen: Do not enable PV IPIs when vector callback not present 2011-08-22 11:28:09 -04:00
spinlock.c xen: Use this_cpu_ops 2010-12-17 15:07:19 +01:00
suspend.c xen: suspend: add "arch" to pre/post suspend hooks 2011-02-25 16:43:12 +00:00
time.c xen: use non-tracing preempt in xen_clocksource_read() 2011-08-24 09:54:24 -07:00
trace.c xen/trace: Fix compile error when CONFIG_XEN_PRIVILEGED_GUEST is not set 2011-08-05 09:43:02 -04:00
vdso.h
vga.c xen: allow enable use of VGA console on dom0 2011-06-06 11:46:00 -04:00
xen-asm_32.S percpu: remove per_cpu__ prefix. 2009-10-29 22:34:15 +09:00
xen-asm_64.S xen: use iret for return from 64b kernel to 32b usermode 2009-12-03 11:14:54 -08:00
xen-asm.h xen: make direct versions of irq_enable/disable/save/restore to common code 2009-02-04 16:59:04 -08:00
xen-asm.S x86: style cleanups for xen assemblies 2009-02-05 20:25:41 +01:00
xen-head.S x86, asm: Cleanup unnecssary macros in asm-offsets.c 2011-02-25 16:37:32 -08:00
xen-ops.h Merge branch 'stable/vga.support' into stable/drivers 2011-06-21 09:25:41 -04:00