lkml.org 
[lkml]   [2008]   [Jun]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Does anyone run AXFS in 2.4 version of kernel ? I am trying my best to apply AXFS patches into 2.4.18
Today I carefully read the mkfs.axfs.c , I finally make clear about
the axfs is how to organize the structure ,including the spec of super
,and the content of region , and how to store the file content in
different region are .

Jared Hulber is a great programmer , this is a very complex thing .
I am ready for writing a document about I have known for more newbies for axfs.

----
In fact , yesterday , I asked a stupid question to Jared Hulbert , the
information from /proc/axfs/volume0 is engough to create a valid xml
file .

for example ,from
./bin/busybox,0,18

./bin/busybox,28672,2

./bin/busybox,53248,4

./bin/busybox,143360,3

./bin/busybox,147456,3

./bin/busybox,151552,8

./bin/busybox,155648,11

we can know the page of offset 0 is called 18 times ,compared with
other pages , it should be set XIP.
<xipfsmap>
<file>
<name>
./bin/busybox
</name>
<chunk>
<size>4096</size>
<offset>0</offset> //maybe we need convert it from /proc info
</chunk>
</file>
</xipfsmap>
the advantage of AXFS is that we can set every page to be XIP , so the
size is certainly 4096. but if we think like this , the size item in
the xml is useless, I think maybe Jared Hulber want to provide some
lazy method to set contiguous pages to be XIP , you don't need to
write some chunk . but I feel that the chance of contiguous pages are
read is not high , so for us , setting every page is enough .

if we want to set many pages to be XIP , we should write many chunk items .

Am I right , Mr Hulbert ?

Best Regards,
Bob


\
 
 \ /
  Last update: 2008-06-17 17:01    [W:0.082 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site