linux-kernel - Re: [PATCH v3 0/7] CFS Bandwidth Control

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:	Wed, 17 Nov 2010 16:32:29 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	bharata@...ux.vnet.ibm.com
CC:	linux-kernel@...r.kernel.org,
	Dhaval Giani <dhaval.giani@...il.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>, Pete@...per.es
Subject: Re: [PATCH v3 0/7] CFS Bandwidth Control

On 10/12/2010 03:49 PM, Bharata B Rao wrote:
> Hi,
> 
> Its been a while since we posted CPS hard limits (aka CFS bandwidth control
> now) patches, hence a quick recap first:
> 
> - I have been working on CFS hard limits since last year and have posted
>   a few versions of the same (last post: http://lkml.org/lkml/2010/1/5/44)
> - Paul Turner and Nikhil Rao meanwhile started working on CFS bandwidth
>   control and have posted a couple of versions.
>   (last post v2: http://lwn.net/Articles/385055/)
> 

Hi, All

	I tried it, it works very good! It adds a very useful feature.
It is very helpful for virtualization or cloud-computing I think.
I hope the next version patchset of it will be sent and get merged soon.

When I tested it, my box became dead several times, infrequently, and
I don't know how to reproduce it, but next steps may help to reproduce it:

# mount -t cgroup -o cpu xxx /mnt
# cd /mnt
# mkdir test
# cd test
# echo 5000000 > cpu.cfs_period_us
# echo 1000000 > cpu.cfs_quota_us
# cat /dev/zero > /dev/null &
# echo $! > tasks
# #make the system busy, browse websites and open many tabs in your browser etc
# #but do NOT do things important.
# #after some time, the system may dead. (can not respond even you type AltSysrqC)

Thank you all
Lai
--
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/