Date: Wed, 28 Nov 2001 11:26:04 +1030 (CST) From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: Andrey Pugachev <A110C@svs.ru> Cc: freebsd-hackers@FreeBSD.org Subject: RE: Does FreeBSD support copy-on-write pages? Message-ID: <XFMail.20011128112604.doconnor@gsoft.com.au> In-Reply-To: <002901c17775$2f05e900$5a30ddd5@a110c>
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On 27-Nov-2001 Andrey Pugachev wrote: > I am just curious, can FreeBSD kernel perform function called copy-on-write > pages in Windows NT world? This is tricky feature of NT memory manager. When > several processes (or threads) allocate identical write-enabled memory > pages, system does not allocate physical memory for each process data at > once. The NT kernel allocates only one copy of write-enabled memory region. FreeBSD does support COW when doing things like loading shared libraries and forking processes. I don't have an exact list or anything, but rather just remembering things mentioned on lists etc.. Maybe worth looking in the list archives for a more authorative answer. --- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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