From: Dave Hansen <dave.hansen@intel.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>, linux-mm@kvack.org
Cc: tglx@linutronix.de
Subject: Re: Memory compaction and mlockall()
Date: Wed, 10 Jul 2019 09:20:47 -0700 [thread overview]
Message-ID: <66785c4b-b1cc-7b5a-a756-041068e3bec6@intel.com> (raw)
In-Reply-To: <20190710144138.qyn4tuttdq6h7kqx@linutronix.de>
On 7/10/19 7:41 AM, Sebastian Andrzej Siewior wrote:
> I did not expect a pagefault with mlockall(). I assume it has to do with
> memory compaction.
mlock() doesn't technically prevent faults. From the manpage:
> mlock(), mlock2(), and mlockall() lock part or all of the
> calling process's virtual address space into RAM, preventing that
> memory from being paged to the swap area.
I read that as basically saying there will be no major faults, but minor
faults are possible.
next prev parent reply other threads:[~2019-07-10 16:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 14:41 Sebastian Andrzej Siewior
2019-07-10 16:20 ` Dave Hansen [this message]
2019-07-10 16:45 ` Sebastian Andrzej Siewior
2019-07-10 17:02 ` Dave Hansen
2019-07-10 18:21 ` Yang Shi
2019-07-11 9:43 ` Sebastian Andrzej Siewior
2019-07-11 16:23 ` Yang Shi
2019-08-12 14:59 ` Vlastimil Babka
2019-08-12 15:54 ` Sebastian Andrzej Siewior
2019-08-13 8:23 ` Vlastimil Babka
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