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> + if (ret) > + return ret; > + } > + > + if (phys_len >= PMD_SIZE) { > + ret = mm_get_unmapped_area_aligned(file, addr, len, phys_addr, > + flags, PMD_SIZE, 0); > + if (ret) > + return ret; > + } Hurm, we have contiguous pages now, so PMD_SIZE is not so great, eg on 4k ARM with we can have a 16*2M=32MB contiguity, and 16k ARM uses contiguity to get a 32*16k=1GB option. Forcing to only align to the PMD or PUD seems suboptimal.. > +fallback: > + return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags); Why not put this into mm_get_unmapped_area_vmflags() and get rid of thp_get_unmapped_area_vmflags() too? Is there any reason the caller should have to do a retry? Jason