On Wed, Sep 18, 2013 at 06:03:11PM +0200, Emmanuel Dreyfus wrote: > Emmanuel Dreyfus <m...@netbsd.org> wrote: > > > Thank you for saving my day. But now what happens? > > I note the SATA disks are in IDE emulation mode, and not AHCI. This is > > something I need to try changing: > > Switched to AHCI. Here is below how hard disks are discovered (the relevant > raid > is RAID1 on wd0 and wd1) > > In this setup, vfs.wapbl.flush_disk_cache=1 still get high loads, on both 6.0 > and -current. I assume there must be something bad with WAPBL/RAIDframe
There is at least one thing: RAIDframe doesn't allow enough simultaneously pending transactions, so everything *really* backs up behind the cache flush. Fixing that would require allowing RAIDframe to eat more RAM. Last time I proposed that, I got a rather negative response here. Thor
