Messages in this thread | | | Date | Mon, 19 Oct 2009 09:36:18 -0400 | From | Konrad Rzeszutek Wilk <> | Subject | Re: [RFC Patch] use MTRR for write combining if PAT is not available |
| |
> X.org uses libpciaccess which tries to mmap with write combining enabled via > /sys/bus/pci/devices/*/resource0_wc. Currently, when PAT is not enabled, we > fall back to uncached mmap. Then libpciaccess thinks it succeeded mapping > with write combining anabled and does not set up suited MTRR entries. ;-(
I am not familiar with libpciaccess, but I was wondering why that library cannot realize it failed in its endeavour and use other means to accomplish its goals?
| |