On 02/06/2013 10:24 PM, Glauber Costa wrote:
And one more question, a memory section is 128MB in Linux. If we reserve part of the them for page_cgroup, then anyone who wants to allocate a contiguous memory larger than 128MB, it will fail, right ? Is it OK ?No, it is not. Another take on this: Can't we free all the page_cgroup structure before we actually start removing the sections ? If we do this, we would be basically left with no problem at all, since when your code starts running we would no longer have any page_cgroup allocated. All you have to guarantee is that it happens after the memory block is already isolated and allocations no longer can reach it. What do you think ?
Hi Glauber,I don't think so. We can offline some of the sections and leave the reset online.
For example, we store page_cgroups of memory9~11 in memory8. So when we offline memory8, we free memory8's page_cgroup storing on other section, but we cannot free the page_cgroups
being stored in memory8 if memory9~11 are left online. So we still need to offline memory9~11, and then offline memory8, right ? I think it makes no difference. Thanks. :) -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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