--- In "j.chitte" <> wrote:
>
> --- In "inboxfullforsubash" <inboxfullforsubash@>
> wrote:
> >
> > Hi,
> >
> > I have a TS-7250 which has Linux 2.4.26-ts11 installed on it. The board has
> > 128 MB NAND Flash and 64MB RAM. I ran into this issue of insufficient time
> > resolution (10 ms on gettimeofday() calls) while doing code execution delay
> > measurements on the current Linux 2.4 kernel. I read one of the posts in
> > this group that said the time resolution bug has been fixed in the Linux
> > 2.6 kernel. So now I am trying to install 2.6 on the board. But I have been
> > running into issues while booting. Here is what I did:
> >
> > * Dowloaded the Linux 2.6.21-ts kernel and compiled it successfully with
> > arm-none-linux-gnueabi(compiler crosstool-linux26-3.4.4-2005q3-2.tar.gz).
> >
>
> why are you trying to use 2.6.21-ts ??
>
> it states clearly on the TS site that this kernel is "untested" with NAND
> flash. As you note above, this is what you have on 7250. You will not be able
> to use your 128M yaffs2 root file system!
>
> Check back on this list, I think you need at least 2.6.28 or 2.6.29 to have
> that support working.
>
> Since Matthieu (and others) has kindly done all the hard work and got working
> what TS did not "test" I dont see much sense in not benefitting from his
> work. Just go for 2.6.29.1 and his latest patch set.
Just to clarify: 2.6.29, even with Mathieu's and the real-time patches, does
not support HR timers for ep93xx. This is a regression, as it *was* included
up to around 2.6.24. The marvel chip of the TS-7800 has HRT support in the
mainline kernel, and doesn't need the RT patchset.
regards, .......... Charlie
>
> If all you want is more timer resolution it can probably be done as Jim says
> on 2.4 . Indeed if you look in the file section (menu on the left here) you
> will find Eddie from TS kindly posted a modified ts8 kernel with just that.
>
> >>
> This is a new kernel that uses a 1021 Hz system clock in place of the
> standard 1 00 Hz system clock. By changing the frequency of the system clock
> performance may be affected. If you notice anything let me know at
> >>
>
> That should be just a drop in replacement for the standard kernel. Since you
> seem to be completely new at all this you will certainly find that a much
> easier route if that's all you need.
>
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