From: Andi Kleen <ak@linux.intel.com>
To: Andy Lutomirski <luto@kernel.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Dave Hansen <dave.hansen@intel.com>,
Michal Hocko <mhocko@suse.com>,
linux-arch <linux-arch@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: Question on the five-level page table support patches
Date: Mon, 24 Apr 2017 06:03:11 -0700 [thread overview]
Message-ID: <20170424130311.GR4021@tassilo.jf.intel.com> (raw)
In-Reply-To: <CALCETrUcB7STNjVw=WBZdFfz_H1DKcLnj3HHtnGaHGQ1UY8Zrw@mail.gmail.com>
> Can you explain what the issue is? What used to work on Linux and
> doesn't any more? The man page is quite clear:
In old Linux hint was a search hint, so if there isn't a hole
at the hinted area it will search starting from there for a hole
instead of giving up immediately.
Now it just gives up, which means every user has to implement
their own search.
Yes I ran into the same problem and it's annoying. It broke
originally when top down mmap was added I believe
Before the augmented rbtree it was potentially very expensive, but now
it should be cheap.
-Andi
next prev parent reply other threads:[~2017-04-24 13:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-23 10:53 Question on the five-level page table support patches John Paul Adrian Glaubitz
2017-04-24 5:11 ` Andy Lutomirski
2017-04-24 13:03 ` Andi Kleen [this message]
2017-04-24 20:33 ` John Paul Adrian Glaubitz
2017-04-24 16:19 ` Kirill A. Shutemov
2017-04-24 20:37 ` John Paul Adrian Glaubitz
2017-04-24 22:01 ` Kirill A. Shutemov
2017-04-24 22:09 ` David Miller
2017-04-25 7:25 ` Jon Masters
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