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trace: fix documentation 

Mention the ftrace backend too.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1452174932-28657-2-git-send-email-den@openvz.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-01-07 16:55:22 +03:00 committed by Stefan Hajnoczi
parent 585ec7273e
commit 52449a314e
1 changed files with 5 additions and 5 deletions
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10
qemu-options.hx
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@ -3558,13 +3558,13 @@ Specify tracing options.
@table @option
@item events=@var{file}
Immediately enable events listed in @var{file}.
The file must contain one event name (as listed in the @var{trace-events} file)
per line.
This option is only available if QEMU has been compiled with
either @var{simple} or @var{stderr} tracing backend.
The file must contain one event name (as listed in the @file{trace-events} file)
per line; globbing patterns are accepted too. This option is only
available if QEMU has been compiled with the @var{simple}, @var{stderr} or
@var{ftrace} tracing backend.
@item file=@var{file}
Log output traces to @var{file}.
This option is only available if QEMU has been compiled with
the @var{simple} tracing backend.
@end table