Re: [PATCH 00/23] per device dirty throttling -v8

Diego Calleja
2007-08-09T16:23:59Z

El Thu, 09 Aug 2007 11:02:38 -0400, Chuck Ebbert <cebbert@redhat.com> escribió:

> NT maintains atimes by default, at least up to XP. You have to edit the
> registry to turn them off, and it is a single global switch -- not per
> mountpoint like Unix.
>
> And it makes a huge difference there, too.

In windows Vista they've disabled atime updates by default.

And XP maintains atimes, but it uses a trick to avoid the performance
penalty we suffer in linux, similar to what Andi Kleen suggested: they
keep atime updates in memory for one hour, and only sync to disk after
that time - of course they also sync it if there's a oportunity to do it, like
when updating mtime.