On Sun, 11 Feb 2018 13:36:41 +0300 Konstantin Khlebnikov <khlebni...@yandex-team.ru> wrote:
> KPF_WAITERS indicates tasks are waiting for a page lock or writeback. > This might be false-positive, in this case next unlock will clear it. Well, kpageflags is full of potential false-positives. Or do you think this flag is especially vulnerable? In other words, under what circumstances will we have KPF_WAITERS set when PG_locked and PG-writeback are clear? > This looks like worth information not only for kernel hacking. Why? What are the use-cases, in detail? How are we to justify this modification? > In tool page-types in non-raw mode treat KPF_WAITERS without > KPF_LOCKED and KPF_WRITEBACK as false-positive and hide it. > fs/proc/page.c | 1 + > include/uapi/linux/kernel-page-flags.h | 1 + > tools/vm/page-types.c | 7 +++++++ Please update Documentation/vm/pagemap.txt.
