lkml.org 
[lkml]   [2003]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] laptop mode
Jens Axboe wrote:
> On Thu, Oct 09 2003, Marcelo Tosatti wrote:
>
>>
>>On Thu, 9 Oct 2003, Jeff Garzik wrote:
>>
>>
>>>Linux Kernel Mailing List wrote:
>>>
>>>>ChangeSet 1.1150.1.52, 2003/10/08 10:49:45-03:00, axboe@suse.de
>>>>
>>>> [PATCH] laptop mode
>>>>
>>>> Hi Marcelo,
>>>>
>>>> Lots of people have been using this patch with great success, and it's
>>>> been in the SuSE kernel for some months now too. It is also in the -benh
>>>> ppc tree
>>>>
>>>> Basically, it introduces a write back mode of dirty and journal data
>>>> that is more suitable for laptops. At the block layer end, it schedules
>>>> write out of dirty data after the disk has been idle for 5 seconds.
>>>>
>>>> Laptop mode can be switched on and off with /proc/sys/vm/laptop_mode.
>>>> There is also a block_dump sysctl, which if enabled will dump who
>>>> dirties and writes out data. This is very helpful in pinning down who is
>>>> causing unnecessary writes to the disk.
>>>
>>>Red Hat just dropped this patch since it was suspected of data
>>>corruption ;-(
>>
>>Uh, oh... Jens?
>
>
> See my previous mail. I don't see any problems with it, and I've
> certainly not heard of (or experienced myself) problems with the patch.
> I'm waiting for Jeff to expand on his mail, surely he/RH must know more
> about this issue.


That's 100% of my knowledge. Talk to arjan/davej/sct for more info...

That's what RH's field testing showed us, ignore it if you wish... :)

Jeff



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

\
 
 \ /
  Last update: 2005-03-22 13:49    [W:0.068 / U:0.524 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site