On Friday 19 October 2007 17:24, Kumar Gala wrote: > > On Oct 18, 2007, at 6:21 PM, Paul Mackerras wrote: > > > Yuri Tikhonov writes: > > > >> The following patch adds support for 256KB PAGE_SIZE on ppc44x- > >> based boards. > >> The applications to be run on the kernel with 256KB PAGE_SIZE have > >> to be > >> built using the modified version of binutils, where the MAXPAGESIZE > >> definition is set to 0x40000 (as opposite to standard 0x10000). > > > > Have you measured the performance using a 64kB page size? If so, how > > does it compare with the 256kB page size? > > I was wondering about this as well? Isn't this technically in > violation of the ABI?
No it isn't the violation. As stated in "System V ABI. PowerPC processor supplement" (on which the "Linux Standard Base Core Specification for PPC32" is based): " ... Virtual addresses and file offsets for the PowerPC processor family segments are congruent modulo 64 Kbytes (0x10000) or larger powers of 2...". So, 256 Kbytes is just a larger case. -- Yuri Tikhonov, Senior Software Engineer Emcraft Systems, www.emcraft.com _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
