On 02/22/2011 07:28 AM, Andrea Arcangeli wrote:
Hi Minchan, That's my point, we should check if the "thrashing horribly" is really a "recently" or if it has always happened before with 2.6.18 and previous.
I would bet that "thrashing" isn't what he meant. He almost certainly meant "needless I/O" and nothing to do with swapping. I've seen this similar report before. This report is almost always gets answered with a "set your swappiness to an appropriate value" type answer. Or a "your userspace app needs to get smarter" type answer. I think they are trying to do the latter, but need some help from the kernel, and that's what they're trying to do here.
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