Re: computing drop-able caches
From: Johannes Weiner <hannes@cmpxchg.org>
Date: 2016-01-29 01:55:34
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linux-fsdevel, lkml
On Thu, Jan 28, 2016 at 05:29:41PM -0800, Daniel Walker wrote:
On 01/28/2016 05:03 PM, Daniel Walker wrote: [regarding MemAvaiable] This new metric purportedly helps usrespace assess available memory. But, its again based on heuristic, it takes 1/2 of page cache as reclaimable..
No, it takes the smaller value of cache/2 and the low watermark, which is a fraction of memory. Actually, that does look a little weird. Rik? We don't age cache without memory pressure, you don't know how much is used until you start taking some away. Heuristics is all we can offer. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>