Re: [RFC 1/3] powerpc: __copy_tofrom_user tweaked for Cell
From: Geert Uytterhoeven <hidden>
Date: 2008-06-23 12:07:50
On Mon, 23 Jun 2008, Gunnar von Boehn wrote:
quoted
The problem is that the dcbz will generate the alignment exception regardless of whether the data is actually unaligned or not. Once you're on that code path, performance can't be good, can it?In which case will DCBZ create an aligned exception?
When using dcbz on uncached memory, IIRC. With kind regards, Geert Uytterhoeven Software Architect Sony Techsoft Centre The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium Phone: +32 (0)2 700 8453 Fax: +32 (0)2 700 8622 E-mail: Geert.Uytterhoeven@sonycom.com Internet: http://www.sony-europe.com/ Sony Technology and Software Centre Europe A division of Sony Service Centre (Europe) N.V. Registered office: Technologielaan 7 · B-1840 Londerzeel · Belgium VAT BE 0413.825.160 · RPR Brussels Fortis 293-0376800-10 GEBA-BE-BB