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From: Andi Kleen <andi@firstfloor.org>
To: Joe Perches <joe@perches.com>
Cc: Andi Kleen <andi@firstfloor.org>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
	viro@zeniv.linux.org.uk
Subject: Re: [PATCH] proc: faster /proc/*/status
Date: Sun, 7 Aug 2016 10:44:03 -0700	[thread overview]
Message-ID: <20160807174402.GY5871@two.firstfloor.org> (raw)
In-Reply-To: <1470591565.28648.40.camel@perches.com>

> > > It is so bloated that gcc needs to be asked to not screw up with stack
> > > size.
> > What happens when you drop all the noinlines for this? I assume
> > this would alread make it faster. And now that we have bigger
> > stacks we can likely tolerate it.
> 
> %pV recurses through these code paths.
> I believe the maximum current recursion depth is 3.

I assume 2 max would sufficient for all users in kernel.

And perhaps it would be better to get rid of "features" like this,
and instead focus on more common cases.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.

  reply	other threads:[~2016-08-07 17:44 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-06 12:56 Alexey Dobriyan
2016-08-06 22:41 ` Joe Perches
2016-08-09  3:02   ` [PATCH] seq/proc: Modify seq_put_decimal_[u]ll to take a const char *, not char Joe Perches
2016-08-07  3:16 ` [PATCH] proc: faster /proc/*/status Andi Kleen
2016-08-07  8:53   ` Alexey Dobriyan
2016-08-07 16:59     ` Andi Kleen
2016-08-07 17:39       ` Joe Perches
2016-08-07 17:44         ` Andi Kleen [this message]
2016-08-07 21:22           ` Joe Perches
2016-08-09 23:25             ` Andrew Morton
2016-08-10  6:38               ` [RFC PATCH] meminfo: Break apart a very long seq_printf with #ifdefs Joe Perches
2016-08-11 21:50                 ` Andrew Morton
2016-08-11 21:57                   ` Joe Perches

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