Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH v6 2/2] Output stall data in debugfs | Date | Thu, 11 Aug 2011 11:48:26 -0700 |
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Alex Neronskiy <zakmagnus@chromium.org> writes:
> From: Alex Neronskiy <zakmagnus@chromium.com> > > Instead of using the log, use debugfs for output of both stall > lengths and stack traces. Printing to the log can result in > watchdog touches,
Why? Because of printk being slow or something else?
The first could be probably workarounded, especially if you already have "two buffers"
> distorting the very events being measured. > Additionally, the information will not distract from lockups > when users view the log. > > A two-buffer system is used to ensure that the trace information > can always be recorded without contention.
This implies that kernel bug reports will often not contain the back trace, right? Seems like a bad thing to me because it will make bug reports worse.
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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