linux-kernel - Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 3 Jun 2010 16:30:49 +0200
From:	Florian Mickler <florian@...kler.org>
To:	markgross@...gnar.org
Cc:	640e9920@...il.com,
	Arve Hjønnevåg <arve@...roid.com>,
	Brian Swetland <swetland@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alan Stern <stern@...land.harvard.edu>,
	Peter Zijlstra <peterz@...radead.org>,
	Linux PM <linux-pm@...ts.linux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

On Thu, 3 Jun 2010 06:24:49 -0700
mark gross <640e9920@...il.com> wrote:

> On Thu, Jun 03, 2010 at 12:10:03AM -0700, Arve Hjønnevåg wrote:

> ok I'm not getting it.
> is this a fancy com-sci algorithm I should know about?
> 
> --mgross

I think you are at an advantage if you have studied fancy com-sci for
this? Here is an example:

say you have 5 constraints: 
qos1 with a value of 10
qos2 with 5
qos3 with 10
qos4 with 11

Now, you hash that list by the qos-values:

11    ---- 10 	----- 5 
|	   |  	      |
qos4	   qos3       qos2
	   |
	   qos1


To compute the maximum you just walk the "----" list.

To reduce qos4 from 11 to 5 you remove it from its "|" list and
prepend it to the corresponding "|" list.  (4 Pointer adjustments +
searching the "-----" list for the right place to insert.  

result:

10 ---- 5
|	|
qos3	qos4
|	|
qos1	qos2

Cheers,
Flo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/