From: Peter Zijlstra <peterz@infradead.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Nadav Amit <namit@vmware.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
x86@kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
Nadav Amit <nadav.amit@gmail.com>,
Andi Kleen <ak@linux.intel.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH] x86: use WRITE_ONCE() when setting PTEs
Date: Thu, 6 Sep 2018 21:28:52 +0200 [thread overview]
Message-ID: <20180906192852.GC4816@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <8aef58c7-c27c-5df8-69b3-b188dd5f64e8@intel.com>
On Thu, Sep 06, 2018 at 10:21:38AM -0700, Dave Hansen wrote:
> There's probably a massive number of things that would break if we
> assumed sane 64-bit writes can be observed piecemeal.
Do assume, it has been observed. WRITE_ONCE()/READ_ONCE() are _required_
if you cannot have load/store tearing.
next prev parent reply other threads:[~2018-09-06 19:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-02 18:14 [PATCH] x86: use WRITE_ONCE() when setting PTEs Nadav Amit
2018-09-06 17:21 ` Dave Hansen
2018-09-06 19:28 ` Peter Zijlstra [this message]
2018-09-07 14:10 ` Vlastimil Babka
2018-09-06 19:57 ` Peter Zijlstra
2018-09-06 20:12 ` Nadav Amit
2018-09-06 20:27 ` Peter Zijlstra
2018-09-08 10:34 ` [tip:x86/urgent] x86/mm: Use " tip-bot for Nadav Amit
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=20180906192852.GC4816@worktop.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=ak@linux.intel.com \
--cc=dave.hansen@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=jpoimboe@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mhocko@suse.com \
--cc=mingo@redhat.com \
--cc=nadav.amit@gmail.com \
--cc=namit@vmware.com \
--cc=sean.j.christopherson@intel.com \
--cc=tglx@linutronix.de \
--cc=vbabka@suse.cz \
--cc=x86@kernel.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.