help with I/O optimization with object

1999-06-07 Thread Zhihui Zhang
While studying the file ufs_readwrite.c, I see routines like uiomoveco() that calls vm_uiomove() in vm_map.c. I am almost sure that these are new in FreeBSD 3.x. The comment in ffs_read() says "not a VM based I/O requests" == "not headed for the buffer cache". This does not make sense to me alt

Re: help with I/O optimization with object

1999-06-07 Thread Zhihui Zhang
On Mon, 7 Jun 1999, Zhihui Zhang wrote: > > While studying the file ufs_readwrite.c, I see routines like uiomoveco() > that calls vm_uiomove() in vm_map.c. I am almost sure that these are new > in FreeBSD 3.x. The comment in ffs_read() says "not a VM based I/O > requests" == "not headed for t