Messages in this thread | | | From | "Edgecombe, Rick P" <> | Subject | Re: [PATCH v2 bpf 3/3] bpf: use vmalloc with VM_ALLOW_HUGE_VMAP for bpf_prog_pack | Date | Wed, 13 Apr 2022 15:51:46 +0000 |
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CC Mike, who has been working on a direct map fragmentation solution. [0]
On Tue, 2022-04-12 at 14:00 -0700, Song Liu wrote: > Since I am still learning the vmalloc/module_alloc code, I think I am > not really capable of commenting on the direction. From our use > cases, we do see performance hit due to large number of BPF > program fragmenting the page table. Kernel module, OTOH, is not > too big an issue for us, as we usually build hot modules into the > kernel. That being said, we are interested in making the huge page > interface general for BPF program and kernel module. We can > commit resources to this effort.
That sounds great. Please feel free to loop me in if you do.
[0] https://lore.kernel.org/lkml/20220127085608.306306-1-rppt@kernel.org/
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