Subject: Re: MAXPHYS
To: None <firstname.lastname@example.org>
From: Thor Lancelot Simon <email@example.com>
Date: 02/04/2001 18:15:12
On Mon, Feb 05, 2001 at 12:04:02AM +0100, firstname.lastname@example.org wrote:
> > > > away so that they don't ultimately send 8k transfers to the disks.
> > > couldn't be #define MAXPHYS changed to int tell_maxphys(device_major)???
> > >
> > > pciide will tell 64kB unless modified, ccd depending of
> > > stripe size and value from disks, raidframe a_very_big_value etc., scsi
> > > drivers depending of implement etc..
> > It's not that simple. The maximum transfer size may be limited not by
> > the device you're talking to but by, for example, the bus you're talking
> char maxphys_table_shifts[MAX_MAJOR];
> so maybe 1<<maxphys_table_shifts[device_major] with table filled on system
No, that just doesn't work. Plenty of systems have instances of the same
device attached to different buses.
Thor Lancelot Simon email@example.com
And now he couldn't remember when this passion had flown, leaving him so
foolish and bewildered and astray: can any man?