On Mon, Oct 25, 2010 at 11:17:22AM +0200, Juergen Hannken-Illjes wrote: > 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:
Do we implement MADV_WILLNEED? Joerg
