--- In "Frank Pagliughi" <>
wrote:
>
> Wow, thanks, I never realized there were so many different speeds
for
> Flash memory. Went down to the camera store and bought a couple
> different brands of fast SD Cards.
>
> It kind of made the problem worse!
>
> Now the hangups happen less often, but when they do, they are
> significantly longer - like 30 sec!
>
I bet you bought a nice big capacity as well ;) Bigger blocks ??
/js
> I can deal with a relatively high thread latency, but I can't
believe
> a driver would lock out the whole system for that long.
>
> Frank
>
>
> --- In <leaton10@> wrote:
> >
> > I've seen the same thing on the TS7250, but when writing to the on
> board flash.
> > It's probably the same thing. I imagine interrupts are disabled by
> the kernel when writing to the flash.
> > The SD is probably smarter though. It's probably blocking access
> till it's done.
> > Maybe there is an ioctl call to detect busy you could use
> > You could get a faster SD card.
> > Larry
> >
> > From: "Frank Pagliughi" <fpagliughi@>
> > Date: 2007/08/07 Tue PM 01:44:02 EST
> > To:
> > Subject: [ts-7000] SD Card write delays
> >
> > Hey All,
> >
> > I'm using a TS-7260 for a data-logger type of application, using a
> > slightly modified ts11 kernel, the on-board flash for the root
file
> > system, with an SD Card mounted.
> >
> > The application writes its data to the SD Card, but the writes
> > occasionally lock up the whole system for something like 8-10
seconds.
> > I'm guessing when a block is being erased/written. Seems that
> > everything running at user level just stops for that time.
> >
> > Is anyone (everyone) else seeing this? Is there a workaround?
> >
> > Any help would be apreciated.
> >
> > Frank
> >
>
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