ia64/xen-unstable

view config/Linux.mk @ 18732:4413d53a8320

x86: highmem handling assistance hypercalls

While looking at the origin of very frequently executed hypercalls I
realized that the high page accessor functions in Linux would be good
candidates to handle in the hypervisor - clearing or copying to/from
a high page is a pretty frequent operation (provided there's enough
memory in the domain). While prior to the first submission I only
measured kernel builds (where the results are not hinting at a
meaningful improvement), I now found time to do a more specific
analysis: page clearing is being improved by about 20%, page copying
doesn't seem to significantly benefit (though that may be an effect of
the simplistic copy_page() implementation Xen currently uses) -
nevertheless I would think that if one function is supported by the
hypervisor, then the other should also be.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Oct 27 13:29:35 2008 +0000 (2008-10-27)
parents 3409c35a0b0e
children 7f9286d21706
line source
1 include $(XEN_ROOT)/config/StdGNU.mk
3 # You may use wildcards, e.g. KERNELS=*2.6*
4 KERNELS ?= linux-2.6-xen
6 XKERNELS := $(foreach kernel, $(KERNELS), \
7 $(patsubst buildconfigs/mk.%,%, \
8 $(wildcard buildconfigs/mk.$(kernel))) )