On Thu, Apr 27, 2006 at 03:47:37PM -0400, Mike Jakubik wrote: > Bartosz Fabianowski wrote: > >>You wrote that Giant is needed in 6.0 and now you write it has been > >>removed. > > > >In 4.x, every UFS write requires the Giant lock. In 6.x, Giant is not > >normally required, making file system operations faster. When you > >enable QUOTA, you basically get back to the 4.x behavior where Giant > >is needed for each write. This is why in 6.x UFS will normally be > >faster but if you enable QUOTA, you lose the newly gained performance > >again. > > Why isn't QUOTA mpsafe then?
Because code doesn't grow on trees. There are uncommitted patches though - perhaps you can test them and get back to the author with your feedback. Kris
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