On Wed, Oct 10, 2012 at 11:34:48AM +0200, Manuel Bouyer wrote: > On Tue, Oct 09, 2012 at 05:59:06PM -0700, Chuck Silvers wrote: > > > [...] > > > with a 'cat big_file > /dev/null' > > > writes are still limited to 64k ... > > > > I would hope that cat'ing a file to /dev/null wouldn't result in any > > writes. :-) > > I assume you meant 'cat big_file > other_file' ? > > I use: dd if=/dev/zero of=bigfile bs=1g count=7 > > > > > if so, then the reason for the 64k writes would be this block of code in > > ffs_write(): > > > > if (!async && oldoff >> 16 != uio->uio_offset >> 16) { > > mutex_enter(vp->v_interlock); > > error = VOP_PUTPAGES(vp, (oldoff >> 16) << 16, > > (uio->uio_offset >> 16) << 16, > > PGO_CLEANIT | PGO_JOURNALLOCKED | PGO_LAZY); > > if (error) > > break; > > } > > > > that's it. I did s/16/32/g in the code above and now I get 128k writes.
32? Not 17? Thor