From: Davidlohr Bueso <dave@stgolabs.net>
To: Leon Romanovsky <leon@leon.nu>
Cc: Geliang Tang <geliangtang@163.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Hugh Dickins <hughd@google.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Joonsoo Kim <js1304@gmail.com>, Arnd Bergmann <arnd@arndb.de>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Oleg Nesterov <oleg@redhat.com>, Linux-MM <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/3] mm/nommu: drop unlikely behind BUG_ON()
Date: Sun, 4 Oct 2015 19:04:06 -0700 [thread overview]
Message-ID: <20151005020406.GB8831@linux-uzut.site> (raw)
In-Reply-To: <CALq1K=JTWq+p0M+45nKm4yMs06k=Mt3y7+hbv6Usx+eX+=2MLQ@mail.gmail.com>
On Sun, 04 Oct 2015, Leon Romanovsky wrote:
>On Sun, Oct 4, 2015 at 9:18 AM, Geliang Tang <geliangtang@163.com> wrote:
>> BUG_ON() already contain an unlikely compiler flag. Drop it.
>It is not the case if CONFIG_BUG and HAVE_ARCH_BUG_ON are not set.
Yeah, but that's like the 1% of the cases -- and those probably don't even care
about the branch prediction (I could be wrong). So overall I like getting rid of
explicit BUG_ON(unlikely(... calls. In fact there's a _reason_ why there are so
few of them in the kernel.
Thanks,
Davidlohr
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-10-05 2:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <a89c7bef0699c3d3f5e592c58ff3f0a4db482b69.1443937856.git.geliangtang@163.com>
[not found] ` <cf38aa69e23adb31ebb4c9d80384dabe9b91b75e.1443937856.git.geliangtang@163.com>
2015-10-04 6:18 ` [PATCH 3/3] mm/nommu: drop unlikely behind BUG_ON() Geliang Tang
2015-10-04 11:02 ` Leon Romanovsky
2015-10-05 2:04 ` Davidlohr Bueso [this message]
2015-10-05 7:49 ` Leon Romanovsky
2015-10-05 1:50 ` Davidlohr Bueso
2015-10-05 2:30 ` Geliang Tang
2015-10-05 3:37 ` Davidlohr Bueso
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20151005020406.GB8831@linux-uzut.site \
--to=dave@stgolabs.net \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=geliangtang@163.com \
--cc=hughd@google.com \
--cc=js1304@gmail.com \
--cc=kirill.shutemov@linux.intel.com \
--cc=leon@leon.nu \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=oleg@redhat.com \
--cc=paul.gortmaker@windriver.com \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).