Messages in this thread | | | Date | Fri, 16 Jan 2009 23:16:08 -0500 | Subject | Re: Kernel vs user memory | From | Bryan Donlan <> |
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On Fri, Jan 16, 2009 at 9:56 PM, sidc7 <siddhartha.chhabra@gmail.com> wrote: > > The kernel maintains a free list of pages that are free in physical memory. I > was wondering, are these pages in the kernel space ? They are not mapped to > any of the user address space for sure, so will they be in the kernel memory > ?
Of course. Note that much of user address space is also mapped into kernel address space (all of it, in fact, unless you're on a 32-bit x86 system with PAE and more than 3G or so of RAM), so such a clear division isn't quite that easy :)
All the gory details are in mm/page_alloc.c and mm/slab.c (or slub.c or slob.c, depending on your build configuration).
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