From: Gao Xiang <gaoxiang25@huawei.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: devel@driverdev.osuosl.org,
"Christoph Hellwig" <hch@infradead.org>,
"Valdis Klētnieks" <valdis.kletnieks@vt.edu>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org,
"Sasha Levin" <alexander.levin@microsoft.com>,
linux-fsdevel@vger.kernel.org,
"OGAWA Hirofumi" <hirofumi@mail.parknet.co.jp>
Subject: Re: [PATCH] staging: exfat: add exfat filesystem code to staging
Date: Fri, 30 Aug 2019 16:43:33 +0800 [thread overview]
Message-ID: <20190830084333.GA193084@architecture4> (raw)
In-Reply-To: <20190830083445.GL23584@kadam>
Hi Dan,
On Fri, Aug 30, 2019 at 11:34:45AM +0300, Dan Carpenter wrote:
> On Fri, Aug 30, 2019 at 12:04:41AM +0800, Gao Xiang wrote:
> > Anyway, I'm fine to delete them all if you like, but I think majority of these
> > are meaningful.
> >
> > data.c- /* page is already locked */
> > data.c- DBG_BUGON(PageUptodate(page));
> > data.c-
> > data.c: if (unlikely(err))
> > data.c- SetPageError(page);
> > data.c- else
> > data.c- SetPageUptodate(page);
>
> If we cared about speed here then we would delete the DBG_BUGON() check
> because that's going to be expensive. The likely/unlikely annotations
> should be used in places a reasonable person thinks it will make a
> difference to benchmarks.
DBG_BUGON will be a no-op ((void)x) in non-debugging mode,
I discussed related stuffs with Greg many months before [1] and
other filesystems also have similar functions...
p.s. I think we come to an agreement here...
I killed all unlikely/likely.
[1] http://driverdev.linuxdriverproject.org/pipermail/driverdev-devel/2018-November/128951.html
sorry about no lore here.
Thanks,
Gao Xiang
>
> regards,
> dan carpenter
>
next prev parent reply other threads:[~2019-08-30 8:44 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-28 16:08 [PATCH] staging: exfat: add exfat filesystem code to staging Greg Kroah-Hartman
2019-08-28 17:00 ` Greg Kroah-Hartman
2019-08-29 6:23 ` Christoph Hellwig
2019-08-29 6:39 ` Greg Kroah-Hartman
2019-08-29 9:41 ` Christoph Hellwig
2019-08-29 9:50 ` Greg Kroah-Hartman
2019-08-29 10:37 ` Christoph Hellwig
2019-08-29 11:04 ` Gao Xiang
2019-08-29 11:18 ` Greg Kroah-Hartman
2019-08-29 11:18 ` Greg Kroah-Hartman
2019-08-29 15:11 ` Dan Carpenter
2019-08-29 15:27 ` Gao Xiang
2019-08-29 15:43 ` Dan Carpenter
2019-08-29 15:51 ` Gao Xiang
2019-08-29 16:04 ` Gao Xiang
2019-08-30 8:34 ` Dan Carpenter
2019-08-30 8:43 ` Gao Xiang [this message]
2019-08-30 11:26 ` Dan Carpenter
2019-08-30 12:04 ` Gao Xiang
2019-08-29 16:44 ` Gao Xiang
2019-08-29 16:59 ` Joe Perches
2019-08-29 17:02 ` Gao Xiang
2019-08-30 2:06 ` Chao Yu
2019-08-30 6:38 ` Gao Xiang
2019-08-30 12:00 ` Checking usage of likeliness annotations Markus Elfring
2019-08-30 11:51 ` [PATCH] staging: exfat: add exfat filesystem code to staging David Sterba
2019-08-31 3:50 ` Chao Yu
2019-08-30 15:36 ` Christoph Hellwig
2019-08-30 21:54 ` Dave Chinner
2019-08-31 10:31 ` Valdis Klētnieks
2019-09-01 0:04 ` Dave Chinner
2019-08-29 7:01 ` Gao Xiang
2019-08-29 8:24 ` Gao Xiang
2019-08-29 9:51 ` Christoph Hellwig
2019-08-29 12:14 ` Pali Rohár
2019-08-29 12:34 ` Valdis Klētnieks
2019-08-29 12:46 ` Pali Rohár
2019-08-29 14:08 ` Markus Elfring
2019-08-29 15:44 ` Markus Elfring
2019-08-29 20:56 ` Pali Rohár
2019-08-29 23:18 ` Valdis Klētnieks
2019-08-29 23:35 ` Sasha Levin
2019-08-30 7:56 ` Pali Rohár
2019-10-16 14:03 ` Pali Rohár
2019-10-16 14:31 ` Sasha Levin
2019-10-16 16:03 ` Pali Rohár
2019-10-16 16:20 ` Sasha Levin
2019-10-16 16:22 ` Greg Kroah-Hartman
2019-10-16 16:32 ` Pali Rohár
2019-10-16 16:50 ` Greg Kroah-Hartman
2019-10-16 20:33 ` Sasha Levin
2019-10-16 21:53 ` Valdis Klētnieks
2019-10-17 7:53 ` Pali Rohár
2019-10-17 7:50 ` Pali Rohár
2020-02-13 0:06 ` Pali Rohár
2020-02-13 21:18 ` Sasha Levin
2020-02-14 22:16 ` Valdis Klētnieks
2020-02-14 22:43 ` Pali Rohár
2020-02-14 23:25 ` Valdis Klētnieks
2020-04-21 21:30 ` exfat upcase table for code points above U+FFFF (Was: Re: [PATCH] staging: exfat: add exfat filesystem code to staging) Pali Rohár
2020-04-27 15:49 ` Sasha Levin
2020-04-28 7:46 ` Pali Rohár
2019-10-16 16:05 ` [PATCH] staging: exfat: add exfat filesystem code to staging Valdis Klētnieks
2019-08-30 8:03 ` Pali Rohár
2019-08-30 15:40 ` Christoph Hellwig
2019-08-30 15:43 ` Pali Rohár
2019-09-14 13:39 ` [PATCH] staging: exfat: add exfat filesystem code to Park Ju Hyung
2019-09-15 13:54 ` Greg KH
2019-09-15 16:11 ` Ju Hyung Park
[not found] ` <20190918195920.25210-1-qkrwngud825@gmail.com>
2019-09-18 20:12 ` [PATCH] staging: exfat: rebase to sdFAT v2.2.0 Greg KH
2019-09-18 20:13 ` Greg KH
2019-09-18 20:22 ` Ju Hyung Park
2019-09-18 20:26 ` Greg KH
2019-09-18 20:31 ` Ju Hyung Park
2019-09-18 20:46 ` Valdis Klētnieks
2019-09-18 21:31 ` kbuild test robot
2019-09-18 21:31 ` kbuild test robot
2019-09-18 22:17 ` Ju Hyung Park
2019-10-24 9:39 ` [PATCH] staging: exfat: add exfat filesystem code to staging Pali Rohár
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