From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: tglx@linutronix.de, bp@alien8.de, mingo@kernel.org,
luto@kernel.org, torvalds@linux-foundation.org, hpa@zytor.com,
dave.hansen@linux.intel.com, jgross@suse.com,
linux-kernel@vger.kernel.org, zhe.he@windriver.com,
joel@joelfernandes.org, devel@etsukata.com
Subject: Re: [PATCH v2 6/7] x86/entry/64: Remove TRACE_IRQS_*_DEBUG
Date: Thu, 11 Jul 2019 10:05:17 +0200 [thread overview]
Message-ID: <20190711080517.GU3402@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20190710232456.5f2de961@oasis.local.home>
On Wed, Jul 10, 2019 at 11:24:56PM -0400, Steven Rostedt wrote:
> On Thu, 04 Jul 2019 21:56:01 +0200
> Peter Zijlstra <peterz@infradead.org> wrote:
>
> > Since INT3/#BP no longer runs on an IST, this workaround is no longer
> > required.
> >
> > Tested by running lockdep+ftrace as described in the initial commit:
> >
> > 5963e317b1e9 ("ftrace/x86: Do not change stacks in DEBUG when calling lockdep")
>
> It looks like a clean revert, and it passed my ftrace smoke tests with
> lockdep enabled (although I triggered a locked warning unrelated to
> this, with the text_mutex and module_mutex, but I'm hoping my tree has
> the fixes for that).
>
> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Thanks!
> Hmm, does this mean we can remove the IDT switching in the NMI handler
> as well?
I'll have to go look at that; there still are ISTs and NMIs can still
hit those.
next prev parent reply other threads:[~2019-07-11 8:05 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-04 19:55 [PATCH v2 0/7] Tracing vs CR2 (and cleanups) Peter Zijlstra
2019-07-04 19:55 ` [PATCH v2 1/7] x86/paravirt: Make read_cr2() CALLEE_SAVE Peter Zijlstra
2019-07-04 21:49 ` Andy Lutomirski
2019-07-10 19:53 ` Steven Rostedt
2019-07-04 19:55 ` [PATCH v2 2/7] x86/entry/32: Simplify common_exception Peter Zijlstra
2019-07-04 21:51 ` Andy Lutomirski
2019-07-10 20:11 ` Steven Rostedt
2019-07-10 20:14 ` Peter Zijlstra
2019-07-04 19:55 ` [PATCH v2 3/7] x86/entry/64: Simplify idtentry a little Peter Zijlstra
2019-07-04 21:54 ` Andy Lutomirski
2019-07-10 20:23 ` Steven Rostedt
2019-07-04 19:55 ` [PATCH v2 4/7] x86/entry/64: Update comments and sanity tests for create_gap Peter Zijlstra
2019-07-04 21:55 ` Andy Lutomirski
2019-07-10 20:24 ` Steven Rostedt
2019-07-04 19:56 ` [PATCH v2 5/7] x86/mm, tracing: Fix CR2 corruption Peter Zijlstra
2019-07-05 2:18 ` Linus Torvalds
2019-07-05 3:16 ` Andy Lutomirski
2019-07-05 3:27 ` Linus Torvalds
2019-07-05 13:49 ` Peter Zijlstra
2019-07-06 21:41 ` Linus Torvalds
2019-07-06 22:27 ` Steven Rostedt
2019-07-06 22:41 ` Linus Torvalds
2019-07-07 0:08 ` Linus Torvalds
2019-07-07 0:36 ` Andy Lutomirski
2019-07-06 23:50 ` Andy Lutomirski
2019-07-07 3:44 ` Eiichi Tsukata
2019-07-06 11:07 ` Eiichi Tsukata
2019-07-08 7:48 ` Peter Zijlstra
2019-07-08 8:58 ` Eiichi Tsukata
2019-07-08 9:42 ` Eiichi Tsukata
2019-07-09 5:17 ` Eiichi Tsukata
2019-07-07 15:10 ` Andy Lutomirski
2019-07-07 15:11 ` Andy Lutomirski
2019-07-07 18:17 ` Linus Torvalds
2019-07-10 20:27 ` Steven Rostedt
2019-07-11 6:45 ` Greg Kroah-Hartman
2019-07-11 12:12 ` Sasha Levin
2019-07-11 12:21 ` Peter Zijlstra
2019-07-04 19:56 ` [PATCH v2 6/7] x86/entry/64: Remove TRACE_IRQS_*_DEBUG Peter Zijlstra
2019-07-11 3:24 ` Steven Rostedt
2019-07-11 8:05 ` Peter Zijlstra [this message]
2019-07-04 19:56 ` [RFC][PATCH v2 7/7] x86/entry/64: Pull bits into C Peter Zijlstra
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