lkml.org 
[lkml]   [2012]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -mm] make swapin readahead skip over holes
>>>>> "Christoph" == Christoph Lameter <cl@linux.com> writes:

Christoph> On Wed, 11 Jan 2012, John Stoffel wrote:
KOSAKI> so, we can eat free lunch up to 7MB ~= 60(MB/sec) * 1000 / 8.5(ms).
>>
>> What if the disk is busy doing other writeout or readin during this
>> time? You can't assume you have the full disk bandwidth available,
>> esp when you hit a swap storm like this.

Christoph> The assumptions by Kosaki are quite conservative.

Just checking

Christoph> What if one did not get a disk from the garbage heap but
Christoph> instead has a state of the art storage cluster or simply an
Christoph> SSD (in particular relevant now since HDs are in short
Christoph> supply given the situation in Asia)?

I don't know, I was just trying to make sure he thinks about disks
which are slower than he expects, since there are lots of them still
out there.

John



\
 
 \ /
  Last update: 2012-01-11 22:07    [W:1.318 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site