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Groups > linux.kernel > #1402812
| From | Michal Hocko <mhocko@kernel.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: malloc() size in CMA region seems to be aligned to CMA_ALIGNMENT |
| Date | 2016-05-18 10:50 +0200 |
| Message-ID | <rA5l0-87e-31@gated-at.bofh.it> (permalink) |
| References | <rzPge-6lc-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
[CC linux-mm and some usual suspects] On Tue 17-05-16 23:37:55, lunar12 lunartwix wrote: > A 4MB dma_alloc_coherent in kernel after malloc(2*1024) 40 times in > CMA region by user space will cause an error on our ARM 3.18 kernel > platform with a 32MB CMA. > > It seems that the malloc in CMA region will be aligned to > CMA_ALIGNMENT everytime even if the requested malloc size is very > small so the CMA region is not available after the malloc operations. > > Is there any configuraiton that can change this behavior?? > > Thanks > > Cheers > Ken -- Michal Hocko SUSE Labs
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malloc() size in CMA region seems to be aligned to CMA_ALIGNMENT lunar12 lunartwix <lunartwix@gmail.com> - 2016-05-17 17:40 +0200
Re: malloc() size in CMA region seems to be aligned to CMA_ALIGNMENT Michal Hocko <mhocko@kernel.org> - 2016-05-18 10:50 +0200
Re: malloc() size in CMA region seems to be aligned to CMA_ALIGNMENT lunar12 lunartwix <lunartwix@gmail.com> - 2016-05-18 15:20 +0200
Re: malloc() size in CMA region seems to be aligned to CMA_ALIGNMENT Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-19 03:00 +0200
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