> The only problem with mmap(): You cannot know, if the page > changed under you a**. > > What would first mmap()ed page of the screen look like, if some > accelerator wrote a line there? Invalidating all mmap()ed pages > for each and every accelerator command would be evil. Forbidding > reads of that page is evil, too. > > I have the same problem with DSPs, which like to mmap() some of > their memory into the application, but can alter this memory > every instruction the execute. I know about this problem for some time :-( Unfortunely most cards don't have OpenGL or some similar api on chip. Of course you don't have to invalid all the mappings. Only the ones the accelerator affected. This plus proper serialization could over come this. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Re: LANANA: To Pending Device Number Registrants Linus Torvalds
- Re: LANANA: To Pending Device Number Registrants Alan Cox
- Re: LANANA: To Pending Device Number Registrants Linus Torvalds
- Re: LANANA: To Pending Device Number Registrants Alexander Viro
- Re: LANANA: To Pending Device Number Registrants James Simmons
- Re: LANANA: To Pending Device Number Registrants Alexander Viro
- Re: LANANA: To Pending Device Number Registrants James Simmons
- Re: LANANA: To Pending Device Number Registrants Alexander Viro
- Re: LANANA: To Pending Device Number Registrants James Simmons
- Re: LANANA: To Pending Device Number Registrants Ingo Oeser
- Re: LANANA: To Pending Device Number Registrants James Simmons
- Re: LANANA: To Pending Device Number Registrants Alexander Viro
- Re: LANANA: To Pending Device Number Registrants Helge Hafting
- Re: LANANA: To Pending Device Number Registrants James Simmons
- Re: LANANA: To Pending Device Number Registrants Chip Salzenberg
- Re: LANANA: To Pending Device Number Registrants James Simmons
- Re: LANANA: To Pending Device Number Registrants Linus Torvalds
- Re: LANANA: To Pending Device Number Registrants Johannes Erdfelt
- Re: LANANA: To Pending Device Number Registrants Linus Torvalds
- Re: LANANA: To Pending Device Number Registrants H. Peter Anvin
- Re: LANANA: To Pending Device Number Registrants Johannes Erdfelt