Mauro Carvalho Chehab írta: > Jean-Francois Moine wrote: >> On Sat, 23 Jan 2010 09:10:44 +0100 >> Németh Márton <nm127@xxxxxxxxxxx> wrote: >> >>>> is more readable, smaller and quicker (less MMU switches) than: >>> What do you mean under MMU switches? >> The MMU has an associative memory which is used in the first step to >> translate a logical address (page) to the physical RAM address. Every >> time an address is not in this memory, a MMU interrupt occurs. Then, the >> system scans the page tables of the process, and either reloads the >> associative memory or calls the swap system to bring the page into the physical memory. >> >> An associative memory is complex and its complexity grows exponentially >> with its size. So, usually, it is rather small. Then, the more the code >> is small and the less MMU interrupts occur... > > Linux doesn't use swap memory for the kernel. It will be using a physical RAM memory > for the entire kernel. So, I don't think MMU applies here. As far as I can understand the description is about the cache. The cache is the storage area which is usually small and speeds up RAM access. Regards, Márton Németh -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
