linux-kernel - Re: [GIT PULL] kdbus for 4.1-rc1

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Message-ID: <CAFLxGvzv5446x=+zT3yQv7qoR9MfEkWyEeOP=5e1dsPNTBcS_w@mail.gmail.com>
Date:	Thu, 23 Apr 2015 23:33:19 +0200
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	David Herrmann <dh.herrmann@...il.com>
Cc:	Borislav Petkov <bp@...en8.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>, Jiri Kosina <jkosina@...e.cz>,
	Andy Lutomirski <luto@...capital.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Daniel Mack <daniel@...que.org>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: [GIT PULL] kdbus for 4.1-rc1

On Thu, Apr 23, 2015 at 11:22 PM, David Herrmann <dh.herrmann@...il.com> wrote:
> Hi
>
> On Thu, Apr 23, 2015 at 10:56 PM, Borislav Petkov <bp@...en8.de> wrote:
>> On Thu, Apr 23, 2015 at 09:14:33PM +0200, Greg Kroah-Hartman wrote:
>>> I don't know what O(256) means here, O notation usually is used to
>>> show the complexity of a function, so this really is almost always the
>>> same amount of time, based on using the hash function.
>>
>> This is iterating over 256 hash buckets. So O(n) complexity. Better?
>
> No it's not. O(256) equals O(1).

Yeah, that's absolutely correct.
I think Boris wanted to say that iterating over all hash buckets
can be costly.

-- 
Thanks,
//richard
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