Messages in this thread | | | Date | Mon, 9 Jan 2023 13:22:46 -0800 | Subject | Re: [PATCH] perf lock contention: Do not use BPF task local storage | From | Martin KaFai Lau <> |
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On 1/9/23 12:56 PM, Namhyung Kim wrote: > Hello, > > On Mon, Nov 21, 2022 at 9:33 AM Martin KaFai Lau <martin.lau@linux.dev> wrote: >> >> On 11/18/22 11:01 AM, Namhyung Kim wrote: >>> We could fix the task local storage to use the safe BPF allocator, >>> but it takes time so let's change this until it happens actually. >> >> I also got another report on the kfree_rcu path. I am also looking into this >> direction on using the BPF allocator. > > Any progress on this? Are there any concerns about the change?
Yep, I am working on it. It is not a direct replacement from kzalloc to bpf_mem_cache_alloc. eg. Some changes in the bpf mem allocator is needed to ensure the free list cannot be reused before the rcu grace period. There is a similar RFC patchset going into this direction that I am trying with.
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