From: Andi Kleen <ak@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Uros Bizjak <ubizjak@gmail.com>,
linux-kernel@vger.kernel.org, x86@kernel.org,
Andrew Lutomirski <luto@kernel.org>
Subject: Re: [RFC PATCH, x86]: Disable CPA cache flush for selfsnoop targets
Date: Mon, 15 Jul 2019 12:39:38 -0700 [thread overview]
Message-ID: <20190715193938.GG32439@tassilo.jf.intel.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1907152033020.1767@nanos.tec.linutronix.de>
> Right, we don't know where the PAT invocation comes from and whether they
> are safe to omit flushing the cache. The module load code would be one
> obvious candidate.
Module load just changes the writable/executable status, right? That shouldn't
need to flush in any case because it doesn't change the caching attributes.
-Andi
next prev parent reply other threads:[~2019-07-15 19:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 8:12 [RFC PATCH, x86]: Disable CPA cache flush for selfsnoop targets Uros Bizjak
2019-07-11 14:39 ` Andy Lutomirski
2019-07-11 19:00 ` Uros Bizjak
2019-07-15 8:24 ` Thomas Gleixner
2019-07-15 12:04 ` Uros Bizjak
2019-07-15 16:31 ` Andi Kleen
2019-07-15 18:41 ` Thomas Gleixner
2019-07-15 19:19 ` Uros Bizjak
2019-07-15 19:30 ` Thomas Gleixner
2019-07-15 19:38 ` Andi Kleen
2019-07-15 22:12 ` Andy Lutomirski
2019-07-15 22:53 ` Andi Kleen
2019-07-15 23:10 ` Andy Lutomirski
2019-07-16 0:32 ` Andi Kleen
2019-07-15 19:39 ` Andi Kleen [this message]
2019-07-15 19:44 ` Andy Lutomirski
2019-07-15 19:46 ` Thomas Gleixner
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