From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Yury Norov <yury.norov@gmail.com>
Cc: Yun Levi <ppbuk5246@gmail.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
dushistov@mail.ru, Arnd Bergmann <arnd@arndb.de>,
Andrew Morton <akpm@linux-foundation.org>,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
William Breathitt Gray <vilhelm.gray@gmail.com>,
richard.weiyang@linux.alibaba.com, joseph.qi@linux.alibaba.com,
skalluru@marvell.com, Josh Poimboeuf <jpoimboe@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-arch@vger.kernel.org
Subject: Re: [PATCH] lib/find_bit: Add find_prev_*_bit functions.
Date: Wed, 2 Dec 2020 19:37:01 +0200 [thread overview]
Message-ID: <20201202173701.GM4077@smile.fi.intel.com> (raw)
In-Reply-To: <CAAH8bW-jUeFVU-0OrJzK-MuGgKJgZv38RZugEQzFRJHSXFRRDA@mail.gmail.com>
On Wed, Dec 02, 2020 at 09:26:05AM -0800, Yury Norov wrote:
> On Wed, Dec 2, 2020 at 3:50 AM Yun Levi <ppbuk5246@gmail.com> wrote:
...
> I think this patch has some good catches. We definitely need to implement
> find_last_zero_bit(), as it is used by fs/ufs, and their local
> implementation is not optimal.
Side note: speaking of performance, any plans to fix for_each_*_bit*() for
cases when the nbits is known to be <= BITS_PER_LONG?
Now it makes an awful code generation (something like few hundred bytes of
code).
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2020-12-02 17:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-02 1:10 [PATCH] lib/find_bit: Add find_prev_*_bit functions Yun Levi
2020-12-02 9:47 ` Andy Shevchenko
2020-12-02 10:04 ` Rasmus Villemoes
2020-12-02 11:50 ` Yun Levi
2020-12-02 12:06 ` Andy Shevchenko
[not found] ` <CAAH8bW-jUeFVU-0OrJzK-MuGgKJgZv38RZugEQzFRJHSXFRRDA@mail.gmail.com>
2020-12-02 17:37 ` Andy Shevchenko [this message]
2020-12-02 18:27 ` Yun Levi
2020-12-02 18:51 ` your mail Andy Shevchenko
2020-12-02 18:56 ` Andy Shevchenko
2020-12-02 23:16 ` Yun Levi
2020-12-02 18:22 ` Yun Levi
2020-12-02 21:26 ` Yury Norov
2020-12-02 22:51 ` Yun Levi
2020-12-03 1:23 ` Yun Levi
2020-12-03 8:33 ` Rasmus Villemoes
2020-12-03 9:47 ` Re: Yun Levi
2020-12-03 18:46 ` Re: Yury Norov
2020-12-03 18:52 ` Re: Willy Tarreau
2020-12-04 1:36 ` Re: Yun Levi
2020-12-04 18:14 ` Re: Yury Norov
2020-12-05 0:45 ` Re: Yun Levi
2020-12-05 11:10 ` Re: Rasmus Villemoes
2020-12-05 18:20 ` Re: Yury Norov
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