Messages in this thread | | | Subject | Re: copy_from_user/copy_to_user question | From | Steven Rostedt <> | Date | Sat, 03 Dec 2005 13:26:18 -0500 |
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On Sat, 2005-12-03 at 15:35 -0700, Andi Kleen wrote: > Steven Rostedt <rostedt@goodmis.org> writes: > > > > Nope, the kernel is always locked into memory. If you take a page fault > > from the kernel world, you will crash and burn. The kernel is never > > "swapped out". So if you are in kernel mode, going into do_page_fault > > in arch/i386/mm/fault.c there is no path to swap a page in. > > Actually there is - when the page fault was caused by *_user.
Sorry I wasn't clearer. I know the copy_user case (and explained it in detail earlier in this thread). I was talking about what happens in the memcpy case. So that should have said "outside of copy_user and friends, there is no path to swap a page in".
-- Steve
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