From: Peter Zijlstra <peterz@infradead.org>
To: Jianyu Zhan <nasa4836@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
kirill.shutemov@linux.intel.com, Rik van Riel <riel@redhat.com>,
Jiang Liu <liuj97@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@suse.de>,
Andrea Arcangeli <aarcange@redhat.com>,
sasha.levin@oracle.com, liwanp@linux.vnet.ibm.com,
khalid.aziz@oracle.com, "linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH RFC 2/2] mm: introdule compound_head_by_tail()
Date: Mon, 28 Apr 2014 17:55:40 +0200 [thread overview]
Message-ID: <20140428155540.GJ27561@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAHz2CGUueeXR2UdLXBRihVN3R8qEUR8wWhpxYjA6pu3ONO0cJA@mail.gmail.com>
On Mon, Apr 28, 2014 at 11:53:28PM +0800, Jianyu Zhan wrote:
> Actually, I checked the assembled code, the compiler is _not_
> so smart to recognize this case. It just does optimization as
> the hint unlikely() told it.
What version, and why didn't your changelog include this useful
information?
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WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Jianyu Zhan <nasa4836@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>,
kirill.shutemov@linux.intel.com, Rik van Riel <riel@redhat.com>,
Jiang Liu <liuj97@gmail.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@suse.de>,
Andrea Arcangeli <aarcange@redhat.com>,
sasha.levin@oracle.com, liwanp@linux.vnet.ibm.com,
khalid.aziz@oracle.com, "linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH RFC 2/2] mm: introdule compound_head_by_tail()
Date: Mon, 28 Apr 2014 17:55:40 +0200 [thread overview]
Message-ID: <20140428155540.GJ27561@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAHz2CGUueeXR2UdLXBRihVN3R8qEUR8wWhpxYjA6pu3ONO0cJA@mail.gmail.com>
On Mon, Apr 28, 2014 at 11:53:28PM +0800, Jianyu Zhan wrote:
> Actually, I checked the assembled code, the compiler is _not_
> so smart to recognize this case. It just does optimization as
> the hint unlikely() told it.
What version, and why didn't your changelog include this useful
information?
next prev parent reply other threads:[~2014-04-28 15:55 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-27 13:35 [PATCH RFC 1/2] mm/swap.c: split put_compound_page function Jianyu Zhan
2014-04-27 13:35 ` Jianyu Zhan
2014-04-27 13:36 ` [PATCH RFC 2/2] mm: introdule compound_head_by_tail() Jianyu Zhan
2014-04-27 13:36 ` Jianyu Zhan
2014-04-28 14:54 ` Michal Hocko
2014-04-28 14:54 ` Michal Hocko
2014-04-28 15:53 ` Jianyu Zhan
2014-04-28 15:53 ` Jianyu Zhan
2014-04-28 15:55 ` Peter Zijlstra [this message]
2014-04-28 15:55 ` Peter Zijlstra
2014-04-28 16:23 ` Jianyu Zhan
2014-04-28 16:23 ` Jianyu Zhan
2014-04-28 18:23 ` Michal Hocko
2014-04-28 18:23 ` Michal Hocko
2014-04-28 15:00 ` [PATCH RFC 1/2] mm/swap.c: split put_compound_page function Michal Hocko
2014-04-28 15:00 ` Michal Hocko
2014-04-28 15:54 ` Jianyu Zhan
2014-04-28 15:54 ` Jianyu Zhan
2014-04-28 16:43 ` Khalid Aziz
2014-04-28 16:43 ` Khalid Aziz
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