On Fri, 6 Apr 2001, Andrea Arcangeli wrote:
> ev6 works the way you described AFIK (to flush the write buffer you can use
Thanks for the clarification -- you made me calm down.
> wmb(), note that wmb() semantics doesn't require the cpu to really "flush" but
> just to keep writes oredered across other mb or wmb, but it's basically the
> same from a software point of you and flushing the write buffer synchronously
> obviously provides that semantics). I didn't followed very closely the
Of course -- you only want to do mb (and not wmb) if you need to meet
hw's specific timing or you want to perform a read from a volatile
register of a peripheral device.
> previous part of the thread so I'm not sure what is the issue.
Someone complained of Alpha not having Intel-style MTRRs to set write
combining for fb memory...
-- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Apr 07 2001 - 21:00:18 EST