Date: Sun, 20 Mar 2011 03:02:59 -0500 From: Alan Cox <alan.l.cox@gmail.com> To: J L <dimitar9909@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Question about Reverse Mappings in FreeBSD. Message-ID: <AANLkTikv%2Bt1bLDq83gN6ifFn0GX2MoSPfr1KLd68mBQN@mail.gmail.com> In-Reply-To: <AANLkTikdiBPRJB_Qs11h_vxsnx%2BXOTfAHeg14UGMOzGO@mail.gmail.com> References: <AANLkTikdiBPRJB_Qs11h_vxsnx%2BXOTfAHeg14UGMOzGO@mail.gmail.com>
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On Fri, Mar 18, 2011 at 7:30 PM, J L <dimitar9909@gmail.com> wrote: > I read an article about Reverse Mappings technique in memory management > part. It improves a lot from Linux 2.4 to 2.6. I am wondering is FreeBSD > also have this feature? Which source files should I go to find these? I > want > to do some study on this. > Wish someone can enlighten me. Thank you. > Reverse mappings are implemented by the machine-dependent layer of the virtual memory system, which is called the "pmap". Look for files named pmap.c in the source tree, such as sys/amd64/amd64/pmap.c. In particular, look for the code that manages pv entries. Alan
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