Re: block_device usage and incorrect block writes

2007-01-24 Thread Jens Axboe
On Wed, Jan 24 2007, Chris Frost wrote: > On Thu, Jan 18, 2007 at 01:13:06PM +1100, Jens Axboe wrote: > > noop doesn't guarentee that IO will be queued with the device in the > > order in which they are submitted, and it definitely doesn't guarentee > > that the device will process them in the orde

Re: block_device usage and incorrect block writes

2007-01-24 Thread Chris Frost
On Thu, Jan 18, 2007 at 01:13:06PM +1100, Jens Axboe wrote: > noop doesn't guarentee that IO will be queued with the device in the > order in which they are submitted, and it definitely doesn't guarentee > that the device will process them in the order in which they are > dispatched. noop being FIF

Re: block_device usage and incorrect block writes

2007-01-18 Thread Jan Engelhardt
On Jan 18 2007 13:13, Jens Axboe wrote: > >noop doesn't guarentee that IO will be queued with the device in the >order in which they are submitted, and it definitely doesn't guarentee >that the device will process them in the order in which they are >dispatched. noop being FIFO basically means th

Re: block_device usage and incorrect block writes

2007-01-17 Thread Jens Axboe
On Wed, Jan 17 2007, Chris Frost wrote: > We are working on a kernel module which uses the linux block device > interface as part of a larger project, are seeing unexpected block > write behavior from our usage of the noop scheduler, and were > wondering whether anyone might have feedback on what t