On Sun, Oct 24, 2010 at 05:21:06AM +0000, David Holland wrote:
> On Fri, Oct 22, 2010 at 05:56:06PM +0000, Antti Kantee wrote:
> > Disable mmap path. With the current vnode locking scheme it has
> > a very annoying property: if the source media is slow (like a slow
> > network), the target file will be locked for the duration of the
> > entire max 8MB write and cause processes attempting to e.g. stat()
> > it to "tstile" (for several minutes in the worst case). Revisit
> > this if/when vnode locking gets a little smarter.
>
> Wouldn't it be better to just ratchet back the block size to something
> like 64K that happens faster?
Or first fault the mapped region instead of madvise() like:
int pgsz = getpagesize();
char *q;
volatile char c;
for (q = p; q < p+fs->st_size; q += pgsz)
c = *q;
--
Juergen Hannken-Illjes - hann...@eis.cs.tu-bs.de - TU Braunschweig (Germany)
