From: Juergen Gross <jgross@suse.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
Joel Fernandes <joel@joelfernandes.org>,
He Zhe <zhe.he@windriver.com>
Subject: Re: [RFC][PATCH] tracing/x86: Save CR2 before tracing irqsoff on error_entry
Date: Fri, 22 Mar 2019 06:54:27 +0100 [thread overview]
Message-ID: <176dee6b-983b-c5ca-b212-7cba216f0879@suse.com> (raw)
In-Reply-To: <CAHk-=whSeiDXVvhie_bBPqDw99JNJMdTuX8ef82BhNanyo7zRw@mail.gmail.com>
On 21/03/2019 19:18, Linus Torvalds wrote:
> On Thu, Mar 21, 2019 at 11:05 AM Andy Lutomirski <luto@amacapital.net> wrote:
>>
>> In the long run, I think the right solution is to rewrite even more of
>> this mess in C. We really ought to be able to put the IRQ flag
>> tracing and the context tracking into C code.
>
> Tangentially about this long run thing - can we start discussing just
> dropping PV mode entirely in the long run? Or even not-so-long run?
As Andrew already said: the work is ongoing, but hard.
What I'm planning to do, however, is dropping 32-bit PV code from the
kernel not too far in the future. This is only a small step, but it is
a move in the right direction.
Juergen
next prev parent reply other threads:[~2019-03-22 5:54 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 2:15 [RFC][PATCH] tracing/x86: Save CR2 before tracing irqsoff on error_entry Steven Rostedt
2019-03-21 8:33 ` Peter Zijlstra
2019-03-21 9:02 ` Peter Zijlstra
2019-03-21 10:45 ` Peter Zijlstra
2019-03-21 13:32 ` Steven Rostedt
2019-03-21 13:55 ` Steven Rostedt
2019-03-21 17:23 ` Linus Torvalds
2019-03-21 17:22 ` Peter Zijlstra
2019-03-21 18:05 ` Andy Lutomirski
2019-03-21 18:10 ` Steven Rostedt
2019-03-21 18:27 ` Andy Lutomirski
2019-03-21 20:50 ` Peter Zijlstra
2019-03-22 2:52 ` Andy Lutomirski
2019-03-21 18:28 ` Peter Zijlstra
2019-03-21 18:55 ` Steven Rostedt
2019-03-21 19:31 ` Peter Zijlstra
2019-03-21 19:50 ` Steven Rostedt
2019-03-21 20:03 ` Peter Zijlstra
2019-03-21 20:11 ` Steven Rostedt
2019-03-21 18:18 ` Linus Torvalds
2019-03-21 18:20 ` Andy Lutomirski
2019-03-21 18:25 ` Linus Torvalds
2019-03-21 18:37 ` Peter Zijlstra
2019-03-21 18:39 ` Andy Lutomirski
2019-03-21 20:00 ` Andrew Cooper
2019-03-21 20:35 ` Steven Rostedt
2019-03-21 18:38 ` Andy Lutomirski
2019-03-21 18:42 ` Peter Zijlstra
2019-03-21 18:22 ` hpa
2019-03-22 5:54 ` Juergen Gross [this message]
2019-03-21 18:27 ` Peter Zijlstra
2019-03-21 18:28 ` Andy Lutomirski
2019-03-21 18:33 ` Peter Zijlstra
2019-03-21 13:04 ` Steven Rostedt
2019-04-17 1:52 ` He Zhe
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