On Mon, Feb 27, 2023 at 01:49:27PM +0000, David Howells wrote: > Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> wrote: > > > POSIX requires that "If the file size is increased, the extended area > > shall appear as if it were zero-filled". It is possible to use mmap to > > write past EOF and that data will become visible instead of zeroes. > > > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> > > That seems to work. Do you want me to pass it on to Linus? If not: > > Acked-by: David Howells <dhowells@xxxxxxxxxx> I'll send a patch series with all of this; it doesn't seem terribly urgent. Do you think there's a similar problem for AFS that Brian noted with the generic patch?