On Fri, 4 Oct 2013 15:02:15 -0400 Naoya Horiguchi <n-horigu...@ah.jp.nec.com> wrote:
> Soft dirty bit allows us to track which pages are written since the > last clear_ref (by "echo 4 > /proc/pid/clear_refs".) This is useful > for userspace applications to know their memory footprints. > > Note that the kernel exposes this flag via bit[55] of /proc/pid/pagemap, > and the semantics is not a default one (scheduled to be the default in > the near future.) However, it shifts to the new semantics at the first > clear_ref, and the users of soft dirty bit always do it before utilizing > the bit, so that's not a big deal. Users must avoid relying on the bit > in page-types before the first clear_ref. Is Documentation/filesystems/proc.txt (around line 450) fully up to date here? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
