13.2.1 for XO-1 using external SD card slot
devel.chm.01 at gmail.com
Sat Jun 21 10:32:00 EDT 2014
I'll definitely give this a try. I'm thinking this will be the last
gasp for my family and friend's G1G1 XO-1. With a more
uptodate linux, more memory and performance (because of
the uncompressed file system), and ability to have swap,
this brings the XO-1 back to usability.
I have been using an SD card install but with the latest
release the support for SD card boot/install was not provided
and I hadn't been able to work through the fixes needed
On Fri, Jun 20, 2014 at 9:49 PM, James Cameron <quozl at laptop.org> wrote:
> On Fri, Jun 20, 2014 at 09:39:32AM +1000, James Cameron wrote:
>> Therefore using an SD card instead of NAND flash should increase I/O
>> performance, decrease processor time, and increase available memory.
> I've measured the increase in available memory.
> With the laptop freshly booted at the activity view and the journal
> icon coloured, a program is run that consumes memory in order to
> determine how much is available;
> - moving the root filesystem from NAND to SDIO is a 7% gain, from 146
> MB to 156 MB,
> - leaving the root filesystem on NAND and adding 64 MB swap on SDIO is
> a 31% gain, from 146 MB to 191 MB,
> - moving the root filesystem from NAND to SDIO and adding 64 MB swap
> on SDIO is a 41% gain, from 146 MB to 206 MB.
> A visualisation of the results:
> The test program:
> http://dev.laptop.org/~quozl/z/1WyA0M.txt (oom.c)
> Measurement was the anon-rss in the kernel OOM message, e.g.
> [ 761.307460] Killed process 937 (oom) total-vm:197692kB, anon-rss:183048kB, file-rss:4kB
> James Cameron
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> Devel at lists.laptop.org
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