From: Dave Hansen <dave.hansen@intel.com>
To: Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>
Cc: Nadav Amit <namit@vmware.com>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>, X86 ML <x86@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-arch <linux-arch@vger.kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Kees Cook <keescook@chromium.org>
Subject: Re: [RFC PATCH 5/6] x86/alternatives: use temporary mm for text poking
Date: Wed, 29 Aug 2018 09:37:13 -0700 [thread overview]
Message-ID: <17f2c74c-93fb-5ec8-4022-bd433fe0e429@intel.com> (raw)
In-Reply-To: <CALCETrVixiv+9Eb7yO334gF_C4CLgr0cTDzS==FZ3TXSgMNt9Q@mail.gmail.com>
On 08/29/2018 09:32 AM, Andy Lutomirski wrote:
> It's plausible that there are workloads where the current code is
> faster, such as where we're munmapping a single page via syscall and
> we'd prefer to only flush that one TLB entry even if the flush
> operation is slower as a result.
Yeah, I don't specifically remember testing it. But, I know I wanted to
avoid throwing away thousands of TLB entries when we only want to rid
ourselves of one.
next prev parent reply other threads:[~2018-08-29 16:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-29 8:11 [RFC PATCH 0/6] x86: text_poke() fixes Nadav Amit
2018-08-29 8:11 ` [RFC PATCH 1/6] x86/alternative: assert text_mutex is taken Nadav Amit
2018-08-29 8:59 ` Masami Hiramatsu
2018-08-29 17:11 ` Nadav Amit
2018-08-29 19:36 ` Nadav Amit
2018-08-29 20:13 ` Sean Christopherson
2018-08-29 20:44 ` Nadav Amit
2018-08-29 21:00 ` Sean Christopherson
2018-08-29 22:56 ` Nadav Amit
2018-08-30 2:26 ` Masami Hiramatsu
2018-08-30 5:23 ` Nadav Amit
2018-08-29 8:11 ` [RFC PATCH 2/6] x86/mm: temporary mm struct Nadav Amit
2018-08-29 9:49 ` Masami Hiramatsu
2018-08-29 15:41 ` Andy Lutomirski
2018-08-29 16:54 ` Nadav Amit
2018-08-29 21:38 ` Andy Lutomirski
2018-08-30 1:38 ` Masami Hiramatsu
2018-08-30 1:59 ` Andy Lutomirski
2018-08-31 4:42 ` Masami Hiramatsu
2018-08-29 15:46 ` Andy Lutomirski
2018-08-29 8:11 ` [RFC PATCH 3/6] fork: provide a function for copying init_mm Nadav Amit
2018-08-29 9:54 ` Masami Hiramatsu
2018-08-29 8:11 ` [RFC PATCH 4/6] x86/alternatives: initializing temporary mm for patching Nadav Amit
2018-08-29 13:21 ` Masami Hiramatsu
2018-08-29 17:45 ` Nadav Amit
2018-08-29 8:11 ` [RFC PATCH 5/6] x86/alternatives: use temporary mm for text poking Nadav Amit
2018-08-29 9:28 ` Peter Zijlstra
2018-08-29 15:46 ` Andy Lutomirski
2018-08-29 16:14 ` Peter Zijlstra
2018-08-29 16:32 ` Andy Lutomirski
2018-08-29 16:37 ` Dave Hansen [this message]
2018-08-29 8:11 ` [RFC PATCH 6/6] x86/alternatives: remove text_poke() return value Nadav Amit
2018-08-29 9:52 ` Masami Hiramatsu
2018-08-29 17:15 ` Nadav Amit
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