linux-kernel - Re: [PATCH v2] fs: introduce is_dot

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Message-ID: <20191205070646.GA29612@bombadil.infradead.org>
Date:   Wed, 4 Dec 2019 23:06:46 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        "Theodore Y. Ts'o" <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <yuchao0@...wei.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Tyler Hicks <tyhicks@...onical.com>,
        linux-fsdevel@...r.kernel.org, ecryptfs@...r.kernel.org,
        linux-fscrypt@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] fs: introduce is_dot_dotdot helper for cleanup

On Thu, Dec 05, 2019 at 08:56:07AM +0800, Tiezhu Yang wrote:
> > And, as I asked twice in the last round of review, did you benchmark
> > this change?
> 
> Before sending this v2 patch, I have done the test used with your test
> program and already pointed out the following implementation is better:

I didn't mean "have you run the test program i wrote".  I meant "have you
booted a kernel with this change and done some performance measurements
to see if you've changed anything".