Application-accessible nvram/cache for Linux?

Kevin D. Clark kevin_d_clark at comcast.net
Fri Jun 22 10:43:52 EDT 2007


Michael ODonnell writes:

> >> I don't think they want a drive, they want something like a
> >> battery-backed cache but accessible from user space.
> >
> >Somebody who's done systems programming more recently than me,
> >please speak up, but if you do find a suitable device that
> >looks like a drive, you might be able to create a big file on
> >it and mmap(2) it into system memory.
> 
> I was thinking along those lines, too, but unless you can
> force every write to the memory associated with the mmap'd
> device to immediately trigger a (synchronous) flush to that
> device the data will just get cached.

I was thinking along the same lines too.  fsync()? "hdparm -W 0"?

Regards,

--kevin
-- 
GnuPG ID: B280F24E              God, I loved that Pontiac.
alumni.unh.edu!kdc                   -- Tom Waits



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