linux-kernel - Re: [PATCH 8/7] sched,numa: do not let a move increase the imbalance

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Tue, 24 Jun 2014 21:57:28 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	linux-kernel@...r.kernel.org, chegu_vinod@...com, mgorman@...e.de,
	mingo@...nel.org
Subject: Re: [PATCH 8/7] sched,numa: do not let a move increase the imbalance

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 06/24/2014 10:38 AM, Peter Zijlstra wrote:

>> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index
>> 4723234..e98d290 100644 --- a/kernel/sched/fair.c +++
>> b/kernel/sched/fair.c @@ -1314,6 +1314,12 @@ static void
>> task_numa_compare(struct task_numa_env *env,
>> 
>> if (moveimp > imp && moveimp > env->best_imp) { /* +		 * A task
>> swap is possible, do not let a task move +		 * increase the
>> imbalance. +		 */ +		int imbalance_pct = env->imbalance_pct; +
>> env->imbalance_pct = 100; +		/*
> 
> I would feel so much better if we could say _why_ this is so.

OK, I think patch 9 supercedes this one.  The imbalance tests
were buggy, that is what caused the problem.

- -- 
All rights reversed
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBAgAGBQJTqiyIAAoJEM553pKExN6DCs0IALtGfif7FzFsB+Sf8SkVCjjj
smkFIiSE4JWulnSR+zCtB8nsCyR1vAGBlY5D6Z4TKbfNnXCrsczOfSPK2p4P8nqy
lQ8LyiOn0MkjOy4BAmL4nQsuiBwlNGAG5I2AeesumSjAMCLpFYP+6UuU9UrdPtyF
hKHiafoud2z+zzOoDdKlvb5MIhSwHn8hpBJ51Jlg0AMRMKroEutsYzyzwOErLFTz
4jJ9xOnjmuVaST4qT14JHbwJZYlmolWcvrVeT1AbVvR7pHUuBMwHH4p/PuDa5umO
7srbnDk9Dn856T4JFKQa92dBoXGHjpmRVl37cpqw4PzhlvhMMRKUFvObJZNG8ys=
=NeKl
-----END PGP SIGNATURE-----
--
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/