Messages in this thread | | | Date | Fri, 22 Jan 1999 22:14:57 +0100 | From | Pavel Machek <> | Subject | Re: [Patch available] SCSI-Idle for 2.2.0 |
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Hi!
> > For 2.3.x, when stats per devices will be available, I might come up with a > > smaller patch (namely, the idle time counting will be doable in user space, > > hopefully). Then the only remaining thing in the kernel would be the spin up > > code. > > Not exactly. Look at Pavel Machek's changes included in the latest bdflush > release (V1.6, IIRC). This way, spin down/spin up can well be handled in > user space, using SCSI_IOCTL_{START,STOP}_UNIT in either a seperate > utility or maybe a patch to hdparm. The only thing really missing as of > now is a facility reporting per-drive stats (or idle time > alternatively).
I'd like per-drive statistics much more than idle-time. Per-drive statistics are more usefull, and bdflush has to wakeup repeatedly so reading statistics probably will not hurt that much.
Pavel -- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).
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