> On Wed, Mar 08, 2006 at 02:14:25AM +0100, Roland > Mainz wrote: > > BTW: The discussion was about a _tuneable_ which > could be set to a value > > used as default page size (used by kernel and > returned by > > |getpagesize()|&co.) - the default for this > tuneable should remain 8k. > > It would allow people to switch to 64k pages on > demand and even allows > > them to return to the 8k size if something breaks > (e.g. setting the > > tunable is not mandatory). Additionally a shared > library similar to > > /usr/lib/[EMAIL PROTECTED] could be provided to switch to > the old page size if > > individual userland applications cause trouble. And > there would be a way > > to fix all those broken applications out there. > Without having such a > > tuneable it is almost impossible to fix the > applications which makes the > > situation even worse (which may backfire at some > point in the future). > > The problem here is that you lose most of the > benefits in the kernel if the > size is tunable, in one of two directions: > > either you still have 8k pages in the kernel (i.e. > . you have > 4x the number of page_ts than you need, and you're > e *always* dealing > with large pages), or
I do not see a problem here. The kernel will only offer 64k, 512k and 4M pages (on US1/2/T1). 8k pages will be not available. This eliminates all need for emulation. Holger This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
