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On Wed, Jan 09 2002, Benjamin LaHaise wrote: > On Wed, Jan 09, 2002 at 10:12:11AM -0800, Badari Pulavarty wrote: > > why ? could you explain ? I am not expecting that user buffer be aligned > > to PAGE_SIZE. > > Okay, that part I misread from the message, but that leaves the question of > "does it work?" Iirc, Jeff Merkey tested variable sized ios with nwfs, but > found that triggered bugs in the low level drivers, some of which assume that > all buffer heads within a request have the same block size. Given that > concern, I really don't think this is a safe 2.4 patch. I don't think that point was ever proven, and Jeff never showed any information as to what was broken. I'm reluctant to allow differently sized buffers heads in the _same_ request for 2.4 just to be cautios, but that's a two-liner (or so) in the elevator to stop that from happening. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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