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On Sat, 2003-06-14 at 04:27, Oliver Neukum wrote: > Am Freitag, 13. Juni 2003 23:47 schrieb Dave Hansen: > > The following patches implement something which we like to call UKVA. > > It's a Kernel Virtual Area which is private to a process, just like > > Userspace. You can put any process-local data that you want in the > > area. But, for now, I just put PTE pages in there. > > If you put only such pages there, do you really want that memory to > be per task? IMHO it should be per memory context to aid threading > performance. I think you're confusing what I mean by tasks and processes. A task is something with a task_struct and a kernel stack. A process is a single task, or multiple tasks that share an mm. If things share an mm, they share pagetables implicitly. Per-process _is_ per memory context. > Secondly, doesn't this scream for using large pages? Large pages aren't used for generic user memory at all. That would take some serious surgery. (Don't get Bill started on it :) -- Dave Hansen haveblue@us.ibm.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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