Messages in this thread | | | Subject | Re: [PATCH V6 01/16] perf/core: Add PERF_SAMPLE_DATA_PAGE_SIZE | From | Dave Hansen <> | Date | Wed, 12 Aug 2020 06:53:39 -0700 |
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On 8/12/20 6:39 AM, Liang, Kan wrote: > I searched the vma_mmu_pagesize(). It seems that PowerPC is the only > one that defines a 'strong' function. In other words, the MMUPageSize > and KerelPageSize are the same for X86. However, it seems not true > for the above compound page cases. Is it a bug for smaps? Or am I > missed anything?
__weak unsigned long vma_mmu_pagesize(struct vm_area_struct *vma) { return vma_kernel_pagesize(vma); }
unsigned long vma_kernel_pagesize(struct vm_area_struct *vma) { if (vma->vm_ops && vma->vm_ops->pagesize) return vma->vm_ops->pagesize(vma); return PAGE_SIZE; }
It can be overridden with vm_ops too, not just a weak symbol.
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