On Mon, 8 Aug 2005, Andrew Morton wrote: > Mel Gorman <[EMAIL PROTECTED]> wrote: > > > > Hi, > > > > I am working on a direct reclaim strategy to free up large blocks of > > contiguous pages. The part I have is working fine, but I am finding a > > hundreds of pages that are being used for inodes that I need to reclaim. I > > tried purging the inode lists using a variation of prune_icache() but it > > is not working out. > > > > Given a struct page, that one knows is an inode, can anyone suggest the > > best way to find the inode using it and free it? > > Simple answer: invalidate_mapping_pages(page->mapping, start, end). >
The majority of pages I am seeing no longer have page->mapping set. Does this mean they are in the process of being cleared up? > Problem: races. If you pick a random page up off the LRU and start playing > with its mapping, what stops that mapping from getting freed under your > feet? > Nothing at all, which explains why I occasionally got oops when I was trying to free pages with the mapping set. I am going to follow your suggestions and see how I get on. If it is still not working out, I will try reclaiming when the workload is something other than a large number of kernel compiles to see if I am on the right track at all. Thanks a lot - 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/
