From: Linus Torvalds <torvalds@linux-foundation.org>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Juergen Gross <jgross@suse.com>,
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: Thu, 21 Mar 2019 11:18:53 -0700 [thread overview]
Message-ID: <CAHk-=whSeiDXVvhie_bBPqDw99JNJMdTuX8ef82BhNanyo7zRw@mail.gmail.com> (raw)
In-Reply-To: <CALCETrXqmjJt7azNoEtxs2eBkDd-vjUAYvrjNh_RD30DAvksBw@mail.gmail.com>
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?
What are the pressing advantages of paravirt these days? Because I can
point to a lot of pressing _disadvantages_, and not all of them are
about more complex code as shown by this patch...
Linus
next prev parent reply other threads:[~2019-03-21 18:19 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 [this message]
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
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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