On 02/24/2013 12:40 PM, Phillip Susi wrote: >> > I actually really like the concept behind your patch. It looks >> > like very useful functionality. I'm just saying that I know it >> > will break _existing_ users. > I'm not seeing how it will break anything. Which aspect of the > current behavior is the app relying on? If it is the immediate > removal of clean pages from the cache, then it should not care about > the new behavior since the pages will still be removed very soon when > under high cache pressure. Essentially, they don't want any I/O initiated except that which is initiated by the app. If you let the system get in to reclaim, it'll start doing dirty writeout for pages other than those the app is interested in. I'm also not sure how far the "just use O_DIRECT" argument is going to go: https://lkml.org/lkml/2007/1/10/233 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>