Messages in this thread | | | From | "Xin, Xiaohui" <> | Date | Tue, 6 Apr 2010 13:41:37 +0800 | Subject | RE: [PATCH 1/3] A device for zero-copy based on KVM virtio-net. |
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Michael, >> >>For the DOS issue, I'm not sure how much the limit get_user_pages() >> can pin is reasonable, should we compute the bindwidth to make it?
>There's a ulimit for locked memory. Can we use this, decreasing >the value for rlimit array? We can do this when backend is >enabled and re-increment when backend is disabled.
I have tried it with rlim[RLIMIT_MEMLOCK].rlim_cur, but I found the initial value for it is 0x10000, after right shift PAGE_SHIFT, it's only 16 pages we can lock then, it seems too small, since the guest virito-net driver may submit a lot requests one time.
Thanks Xiaohui
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