Messages in this thread | | | Date | Tue, 21 Jul 2009 12:44:15 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: [PATCH 2/2] perf_counter: detect debugfs location |
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On Tue, 21 Jul 2009, Ray Lee wrote:
> On Tue, Jul 21, 2009 at 9:20 AM, Jason Baron <jbaron@redhat.com> wrote: > > > > Search for the debugfs filesystem in /proc/mounts, but also allows the user to > > specify '--debugfs-dir=blah' or set the environment variable: 'PERF_DIR_DEBUGFS' > > > -static char default_debugfs_path[] = "/sys/kernel/debug/tracing/events"; > > There are server systems out there that run with thousands of mounts. > It would be kinder to the users of those systems (ie, faster perf > startup) if you only went rooting around /proc/mounts if opening the > default location failed.
Well, those that have thousand of mounts could probably get away with setting PERF_DIR_DEBUGFS in /etc/profile.
But, a simple stat("/sys/kernel/debug/tracing") should be easy enough.
-- Steve
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