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SubjectRe: [PATCH v6 0/4] fadvise(DONTNEED) support
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.

--
Jeffrey Hundstad



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