On 23.1.2015 20:18, Andrea Arcangeli wrote:
>+ if (!pte_write(pteval)) { >+ if (++ro > khugepaged_max_ptes_none) >+ goto out_unmap; >+ }It's true this is maxed out at 511, so there must be at least one writable and not none pte (as results of the two "ro" and "none" counters checks).
Hm, but if we consider ro and pte_none separately, both can be lower than 512, but the sum of the two can be 512, so we can actually be in read-only VMA? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>