Date: Tue, 25 Dec 2001 10:04:36 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: Barak Enat <barak_enat@yahoo.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Virtual memory and paging questions Message-ID: <Pine.BSF.4.21.0112251002470.78134-100000@InterJet.elischer.org> In-Reply-To: <038f01c18d2b$9a7a9700$e36596d4@cwnt.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 25 Dec 2001, Barak Enat wrote: > Hi all, > > Note: Please reply to this mail as well because I'm not subscribed to > this mailing list. > > I have two questions regarding FreeBSD virtual memory and > paging/swapping system: > > 1. When a page fault occurs does the entire system stalls, or only the > process that requested the page suspends till the asynchronous > completion of the page read? Only the process requiring the page > > 2. If I create a memory disk (md) and later use it for swapping > (sounds awkward - but still this is what I need...), when a page fault > occurs does a physical memcopy happen from the md page to the main > memory page, or is there a trick in the vm page mapping to actually > use the same physical page from the md? If such a trick exist, where > is it in the code (because I want to turn it off - I need the simple > memcopy behaviour.) I think you are in luck.. > > Thanks in adavnce, Barak > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0112251002470.78134-100000>