linux-kernel - Re: 4.4-final: 28 bioset threads on small notebook

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Date:	Sat, 20 Feb 2016 19:42:58 +0100
From:	Pavel Machek <pavel@....cz>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	kernel list <linux-kernel@...r.kernel.org>, axboe@...com,
	hch@....de
Subject: Re: 4.4-final: 28 bioset threads on small notebook

On Sat 2016-02-20 18:40:35, Pavel Machek wrote:
> 
> On Fri 2015-12-11 09:08:41, Mike Snitzer wrote:
> > On Fri, Dec 11 2015 at  5:49am -0500,
> > Pavel Machek <pavel@....cz> wrote:
> > 
> > > Hi!
> > > 
> > > I know it is normal to spawn 8 threads for every single function,
> > ...
> > > but 28 threads?
> > > 
> > > root       974  0.0  0.0      0     0 ?        S<   Dec08   0:00 [bioset]
> > ...
> > 
> > How many physical block devices do you have?
> > 
> > DM is doing its part to not contribute to this:
> > dbba42d8a ("dm: eliminate unused "bioset" process for each bio-based DM device")
> > 
> > (but yeah, all these extra 'bioset' threads aren't ideal)
> 
> Still there in 4.4-final.

...and still there in 4.5-rc4 :-(.
									Pavel
-- 
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