FUJITA Tomonori wrote: > From: Mike Christie <michaelc at cs.wisc.edu> > Subject: Re: [Stgt-devel] More threads for device server > Date: Sun, 04 Sep 2005 21:05:12 -0500 > > >>>The current code uses work queue for performing SCSI commands (or >>>block target's tasks). Work queue is simple and good enough for >>>debugging, however, a single thread per CPU is not good enough (from >>>the performance perspective). >>> >>>I thought about creating multiple kernel threads by hand. Are there >>>handy APIs? >> >>you can create a single threaded workqueue per target or session? > > > The vfs APIs work synchronously. So we need multiple threads per > target (or session) to perform several SCSI commands simultaneously. > > If we always use asynchronous block I/O APIs (like AIO vfs, > submit_bio, etc), a single threaded workqueue would be fine. Hey what was the submit_bio idea though? Is there a way o do that and still get to use the systems cache? |