Messages in this thread | | | Date | Thu, 17 Apr 2008 18:30:11 +0900 | From | KOSAKI Motohiro <> | Subject | Re: [PATCH 0/8][for -mm] mem_notify v6 |
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Hi Tom
> Here's a test program that allocates memory and frees on notification. > It takes an argument which is the number of pages to use; use a > number considerably higher than the amount of memory in the system. > I'm running this on a system without swap. Each time it gets a > notification, it frees memory and writes out the /proc/meminfo > contents. What I see is that Cached gradually decreases, then Mapped > decreases, and eventually the kernel invokes the oom killer. It may > be necessary to tune some of the constants that control the allocation > and free rates and latency; these values work for my system.
may be...
I think you misunderstand madvise(MADV_DONTNEED). madvise(DONTNEED) indicate drop process page table. it mean become easily swap.
when run on system without swap, madvise(DONTNEED) almost doesn't work as your expected.
I am sorry for being not able to help you. ;)
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