From: Roland Dreier <roland@kernel.org>
To: Jan Kara <jack@suse.cz>
Cc: "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
linux-mm@kvack.org
Subject: Re: Infiniband use of get_user_pages()
Date: Mon, 29 Apr 2013 11:44:19 -0700 [thread overview]
Message-ID: <CAL1RGDWPujGT6HKDg74dFT=C64NyO7y1aYjM1LH9YHZcWbf7qA@mail.gmail.com> (raw)
In-Reply-To: <20130425132157.GA32353@quack.suse.cz>
On Thu, Apr 25, 2013 at 6:21 AM, Jan Kara <jack@suse.cz> wrote:
>> get_user_pages() actually goes to some trouble to return all small pages,
>> even when it has to split a single huge page into many entries in the
>> page array. (Which is actually a bit unfortunate for our use here)
> Does it? As far as I'm checking get_user_pages() and the fault path I
> don't see where it would be happening...
I'm talking about where __get_user_pages() calls follow_hugetlb_page()
and loops to fill in many entries in the page array from one huge
page.
- R.
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next prev parent reply other threads:[~2013-04-29 18:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-24 15:38 Jan Kara
2013-04-24 15:43 ` Christoph Lameter
2013-04-24 22:25 ` Roland Dreier
2013-04-25 13:21 ` Jan Kara
2013-04-29 18:44 ` Roland Dreier [this message]
2013-04-26 17:19 ` KOSAKI Motohiro
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