On 02/23/2013 02:58 PM, Phillip Susi wrote: > 2) Discarding pages under low cache pressure is a waste > 3) It was useless on files being written, and thus full of dirty pages > > Now we just move the pages to the inactive list so they will be reclaimed > sooner. Folks actually use this in practice to flush the page cache out: http://git.sr71.net/?p=eyefi-config.git;a=blob;f=eyefi-linux.c;h=b77a891995109f6caa288925a13985cc495d7b2d;hb=HEAD#l62 I have really good reasons for really wanting to be _rid_ of the page cache no matter how much memory pressure there is. I've seen people at IBM using this to ensure that they stay out of memory reclaim completely. I don't completely agree with the approach, but this would completely ruin their performance since the VM-initiated writeout is so relatively slow for them. I think this patch is a really bad idea. If you want the behavior you're proposing, I'd suggest using another flag. -- 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>