On Tue, 2007-08-14 at 08:29 -0700, Christoph Lameter wrote: > On Tue, 14 Aug 2007, Peter Zijlstra wrote: > > > On Tue, 2007-08-14 at 07:21 -0700, Christoph Lameter wrote: > > > The following patchset implements recursive reclaim. Recursive reclaim > > > is necessary if we run out of memory in the writeout patch from reclaim. > > > > > > This is f.e. important for stacked filesystems or anything that does > > > complicated processing in the writeout path. > > > > > > Recursive reclaim works because it limits itself to only reclaim pages > > > that do not require writeout. It will only remove clean pages from the > > > LRU. > > > The dirty throttling of the VM during regular reclaim insures that the > > > amount > > > of dirty pages is limited. > > > > No it doesn't. All memory can be tied up by anonymous pages - who are > > dirty by definition and are not clamped by the dirty limit. > > Ok but that could be addressed by making sure that a certain portion of > memory is reserved for clean file backed pages.
Which gets us back to the initial problem of sizing this portion and ensuring it is big enough to service the need. - 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/
