on 21/09/2010 09:39 Jeff Roberson said the following: > I'm afraid there is not enough context here for me to know what 'the same > mechanism' is or what solaris does. Can you elaborate?
This was in my first post: [[[ There is this good book: http://books.google.com/books?id=r_cecYD4AKkC&printsec=frontcover Please see section 6.2.4.5 on page 225 and table 6-11 on page 226. And also this code: http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/os/kmem.c#971 ]]] > I prefer not to take the weight of specific examples too heavily when > considering the allocator as it must handle many cases and many types of > systems. I believe there are cases where you want large allocations to be > handled by per-cpu caches, regardless of whether ZFS is one such case. If ZFS > does not need them, then it should simply allocate directly from the VM. > However, I don't want to introduce some maximum constraint unless it can be > shown that adequate behavior is not generated from some more adaptable > algorithm. Yes, I agree in general. But sometimes simplicity has its benefits too as opposed to complex dynamic behavior that _might_ result from adaptive algorithms. Anyway, I have some early patches to implement first two of your suggestions and I am testing them now. Looks good to me so far. Parameters in the adaptions would probably need some additional tuning. -- Andriy Gapon _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
