From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: mingo@elte.hu, Linus Torvalds <torvalds@osdl.org>
Cc: linux-kernel@vger.kernel.org, Stephane Eranian <eranian@google.com>
Subject: [PATCH 0/2] perf: Use LBR for machine/oops debugging
Date: Mon, 29 Mar 2010 14:20:21 +0200 [thread overview]
Message-ID: <20100329122021.765109681@chello.nl> (raw)
The LBRs are relatively cheap to keep enabled and provide some history
to OOPSen, also some CPUs are reported to keep them over soft-reset,
which allows us to use them to debug things like tripple faults.
Therefore introduce a boot option: lbr_debug=on, which always enable
the LBRs and will print the LBRs on CPU init and die().
next reply other threads:[~2010-03-29 12:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-29 12:20 Peter Zijlstra [this message]
2010-03-29 12:20 ` [PATCH 1/2] perf, x86: fix __initconst vs const Peter Zijlstra
2010-03-29 12:20 ` [RFC,PATCH 2/2] perf, x86: Utilize the LBRs for machine/oops debugging Peter Zijlstra
2010-03-29 12:47 ` Stephane Eranian
2010-03-29 14:13 ` Peter Zijlstra
2010-03-29 14:20 ` Stephane Eranian
2010-03-29 17:02 ` Ingo Molnar
2010-03-29 17:12 ` Peter Zijlstra
2010-04-02 20:44 ` Ingo Molnar
2010-03-29 13:08 ` [PATCH 0/2] perf: Use LBR " Andi Kleen
2010-03-29 13:16 ` Stephane Eranian
2010-03-29 14:14 ` Peter Zijlstra
2010-03-29 20:09 ` Andi Kleen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100329122021.765109681@chello.nl \
--to=a.p.zijlstra@chello.nl \
--cc=eranian@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.