Re: [RFC][PATCH 4/5] memory_pressure_notify() caller

[Rik van Riel]

On Tue, 15 Jan 2008 23:55:17 +0100
"Daniel SpÃng" <daniel.spang@xxxxxxxxx> wrote:

> The notification fires after only ~100 MB allocated, i.e., when page
> reclaim is beginning to nag from page cache. Isn't this a bit early?
> Repeating the test with swap enabled results in a notification after
> ~600 MB allocated, which is more reasonable and just before the system
> starts to swap.

Your issue may have more to do with the fact that the
highmem zone is 128MB in size and some balancing issues
between __alloc_pages and try_to_free_pages.

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