Messages in this thread |  | | Date | Thu, 14 Sep 2000 02:19:59 +0000 | From | Pavel Machek <> | Subject | Re: Notebook disk spindown |
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Hi!
> o developpers, > > this is a short description of a particular wish of notebook > users. Since kernel 2.2.11 the buffer flushing deamon is no longer > a user space program but part of the kernel (in fs/buffer.c). > > Before this kernel release it was the bdflush-program which > could be called with certain command line parameters in order > to control flushing of file system buffers. In particular in > combination with the hdparm-program it could be used to > spin down the hard disk (e.g. of laptops) if it was not accessed. > > I know that by writing to /proc/sys/vm/bdflush relevant kernel > paramters may be modified. But there are certain limits compiled > into every kernel, which have the consequence that > > *a silent hard disk hard disk is no longer feasible since kernel > 2.2.11*.
Well, with noflushd daemon, it works for me.
> I have modified the constants used in fs/buffer.c to allow for > bigger time intervals between forced buffer flushings. The "patch" > may be found at http://www.hmi.de/people/brunne/Spindown .
Can you mail me the patch? [I do not have way to access web easily.]
> Shouldn't Linux support hard disk spindown during periods of > inactivity? Is the tiny patch worth of being included into standard > kernels?
Noflushd is little hacky. If your patch is really tiny, post actual patch to l-k for discussion. [Can you gracefully handle case of few active and few inactive disks?] Pavel -- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
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