Messages in this thread | | | From | Jens Axboe <> | Subject | Re: [PATCH for-5.16/block] iocost: Fix divide-by-zero on donation from low hweight cgroup | Date | Tue, 14 Dec 2021 06:58:20 -0700 |
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On Mon, 13 Dec 2021 14:14:43 -1000, Tejun Heo wrote: > The donation calculation logic assumes that the donor has non-zero > after-donation hweight, so the lowest active hweight a donating cgroup can > have is 2 so that it can donate 1 while keeping the other 1 for itself. > Earlier, we only donated from cgroups with sizable surpluses so this > condition was always true. However, with the precise donation algorithm > implemented, f1de2439ec43 ("blk-iocost: revamp donation amount > determination") made the donation amount calculation exact enabling even low > hweight cgroups to donate. > > [...]
Applied, thanks!
[1/1] iocost: Fix divide-by-zero on donation from low hweight cgroup commit: edaa26334c117a584add6053f48d63a988d25a6e
Best regards, -- Jens Axboe
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