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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-08-24 09:54:24 -0700 |
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| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-08-24 09:54:24 -0700 |
| commit | f1c39625d63c9f8eba8f036429c10a9cb9e32920 (patch) | |
| tree | 8ca13e0d5f9c0db22f9933c07a170d865a582fe3 /arch/alpha/include/asm/thread_info.h | |
| parent | fcb8ce5cfe30ca9ca5c9a79cdfe26d1993e65e0c (diff) | |
| download | blackbird-obmc-linux-f1c39625d63c9f8eba8f036429c10a9cb9e32920.tar.gz blackbird-obmc-linux-f1c39625d63c9f8eba8f036429c10a9cb9e32920.zip | |
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>
Diffstat (limited to 'arch/alpha/include/asm/thread_info.h')
0 files changed, 0 insertions, 0 deletions
