n Tue, 6 Nov 2007, Rik van Riel wrote: > Every anonymous, tmpfs or shared memory segment page is potentially > swap backed. That is the whole point of the PG_swapbacked flag.
One of the current issues with anonymous pages is the accounting when they become file backed and get dirty. There are performance issue with swap writeout because we are not doing it in file order and on a page by page basis. Do ramfs pages count as memory backed? > A page from a filesystem like ext3 or NFS cannot suddenly turn into > a swap backed page. This page "nature" is not changed during the > lifetime of a page. Well COW sortof does that but then its a new page. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
