Am Fr, 29.05.2009, 20:26, schrieb Andi Kleen: >> No, the test module is fine. The exact same call in the KVM allocation >> routine, however, does not work. Again, please see my initial post. > > Sorry I don't have time to reverse engineer/debug your patches. > > If you can't state the problem clearly there's probably no way > other people can help you on the mailing list. I'm sorry if I sounded snippy, this wasn't intended. I hope I haven't pissed away your good will yet - which is indeed greatly appreciated. So let me try again to be more precise in specifying my problem: I'm trying to replace a call to alloc_page() with alloc_pages_node() in order to membind the allocation to a specific node set. This seemed to work - as page_to_nid() returns the selected node. However, the free memory in that node isn't decreasing. I tried to build a test module to recreate the problem, but the test module doesn't exhibit the bug. I assume that is because there is something different with the context from which the allocation is happening. I tried to follow the code path of alloc_pages_node() to find out what that difference might be, but didn't succeed. Hence I attached a boiled down version of my changes that still demonstrate the problem. It's really a one line change in kvm. I was hoping that someone with real numa hardware and kvm capabilities would be able to test this tiny patch in order to find out if the problem lies with the fake numa or indeed the context of the allocation so I could focus my efforts on the right target. Alternatively, I'd also be greatful if anybody had any idea why alloc_pages_node() would behave differently in different context and what that difference would be. Again, sorry if I sounded ungreatful. I do appreciate any help or pointers you could give me. I don't expect a final sollution and am willing and ready to invest more time of my own to fixing this. I just need some idea in which direction to go: fake numa or context. Thanks. -- /"\ Best regards, | mlaier@xxxxxxxxxxx \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
