linux-kernel - Re: [PATCH] staging/lustre: avoid zero buf for the first time

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Message-ID: <20160822100408.GA11890@kroah.com>
Date:   Mon, 22 Aug 2016 06:04:08 -0400
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Shawn Lin <shawn.lin@...k-chips.com>
Cc:     Oleg Drokin <oleg.drokin@...el.com>,
        Andreas Dilger <andreas.dilger@...el.com>,
        lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging/lustre: avoid zero buf for the first time

On Mon, Aug 22, 2016 at 04:46:04PM +0800, Shawn Lin wrote:
> We only need to zero it when repeating in order to
> avoid old garbage. Let's improve it by moving this
> before we repeat the calculation to save some cpu
> cycle.
> 
> Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>

Have you noticed a change with this in a benchmark?

If not, is it really worth it?

I need an ack from the lustre developers before taking patches like
this...

thanks,

greg k-h