Messages in this thread | | | Date | Tue, 28 Oct 2003 10:45:43 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: how do file-mapped (mmapped) pages become dirty? |
| |
On Tue, 28 Oct 2003, Chris Friesen wrote:
> Helge Hafting wrote: > > Amir Hermelin wrote: > > >> What function is responsible for this setting? And when will the page be > >> written back to disk (i.e. where's the flusher located)? > >> > > When there's memory pressure, or a sync. > > Note however that you need an msync() -- fsync() and fdatasync() do not > catch changes to mmapped pages. > > Chris >
Sure they do. fsync() will sync the whole file, regardless of whether or not it's been mapped. msync() allows you to sync only a specific portion and control how that portion is handled with some flags.
Cheers, Dick Johnson Penguin : Linux version 2.4.22 on an i686 machine (797.90 BogoMips). Note 96.31% of all statistics are fiction.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |