Messages in this thread | | | Date | Wed, 18 Apr 2012 15:46:32 -0700 | From | Anton Vorontsov <> | Subject | Re: [PATCH 2/2] vmevent: Implement greater-than attribute and one-shot mode |
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On Wed, Apr 18, 2012 at 11:01:02PM +0300, Pekka Enberg wrote: > On Wed, 18 Apr 2012, Anton Vorontsov wrote: > > This patch implements a new event type, it will trigger whenever a > > value becomes greater than user-specified threshold, it complements > > the 'less-then' trigger type. > > > > Also, let's implement the one-shot mode for the events, when set, > > userspace will only receive one notification per crossing the > > boundaries. > > > > Now when both LT and GT are set on the same level, the event type > > works as a cross event type: it triggers whenever a value crosses > > the threshold from a lesser values side to a greater values side, > > and vice versa. > > > > We use the event types in an userspace low-memory killer: we get a > > notification when memory becomes low, so we start freeing memory by > > killing unneeded processes, and we get notification when memory hits > > the threshold from another side, so we know that we freed enough of > > memory. > > > > Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org> > > Did you try vmevent-test with this patch? I'm seeing this:
Yep, with CONFIG_SWAP=n, and I had to a modify the test since I saw the same thing, I believe. I'll try w/ the swap enabled, and see how it goes. I think the vmevent-test.c needs some improvemnts in general, but meanwhile...
> Physical pages: 109858 > read failed: Invalid argument
Can you send me the .config file that you used? Might be that you have CONFIG_SWAP=n too?
Thanks!
-- Anton Vorontsov Email: cbouatmailru@gmail.com
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