On Monday 22 August 2005 22:24, Jeff Dike wrote: > On Fri, Aug 12, 2005 at 07:00:26PM +0200, Blaisorblade wrote: > > Yes, but for the VM, there is nothing else than pagecache and swapcache > > and swap entries. Since that call will drop them, on normal files backing > > store will remain, on tmpfs everything will vanish!
> > Hope you'll implement this soon, if it works. > There was a small omission in my quick analysis, which you alluded to > above. > It's removed from the address space, but preserved in the page cache. Yes, yesterday I realized this point. The pagecache has one additional reference, which is only deleted after try_to_unmap() (the rmap function to detach a page from page tables) succeeds (grep try_to_unmap mm/*.c to find the caller). In fact, the madvise() comment only talks about anonymous memory. Rik, is there any hope to extend madvise() to cater for this? > Run the test below to see this. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
