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:	Fri, 14 May 2010 10:13:31 +0800
From:	Haicheng Li <haicheng.li@...ux.intel.com>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
CC:	Greg KH <gregkh@...e.de>, akpm@...ux-foundation.org,
	linux-mm@...ck.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Alex Chiang <achiang@...com>, linux-kernel@...r.kernel.org,
	ak@...ux.intel.com, fengguang.wu@...el.com,
	shaohui.zheng@...ux.intel.com
Subject: Re: [RFC, 3/7] NUMA hotplug emulator

Dave Hansen wrote:
> On Thu, 2010-05-13 at 09:55 -0700, Greg KH wrote:
>>> Add a sysfs entry "probe" under /sys/devices/system/node/:
>>>
>>>  - to show all fake offlined nodes:
>>>     $ cat /sys/devices/system/node/probe
>>>
>>>  - to hotadd a fake offlined node, e.g. nodeid is N:
>>>     $ echo N > /sys/devices/system/node/probe
>> As you are trying to add a new sysfs file, please create the matching
>> Documentation/ABI/ file as well.
>>
>> Also note that sysfs files are "one value per file", which I don't think
>> this file follows, right?
> 
> I think in this case, it was meant to be a list of acceptable parameters
> rather than a set of values, kinda like /sys/power/state.

Right.

> Instead, I guess we could have:
> 
> 	/sys/devices/system/node/probeable/3
> 	/sys/devices/system/node/probeable/43
> 	/sys/devices/system/node/probeable/65
> 	/sys/devices/system/node/probeable/5145
> 
> and the knowledge that you need to pick one of those to echo
> into /sys/devices/system/node/probe.

I think this way would make things complex if we just want to show user which node could be hotadded.

>  But, it's a lot more self
> explanatory if you 'cat /sys/devices/system/node/probe', and then pick
> one of those to echo back into the file.

agreed.

> Seems like a decent place to violate the "rule". :)



--
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/

Powered by blists - more mailing lists