On Thu, Jan 21, 2016 at 02:34:28PM -0700, Jens Axboe wrote: > On 01/21/2016 07:57 AM, Stefan Haberland wrote: > >Hi, > > > >unfortunately commit e36f62042880 "block: split bios to maxpossible length" > >breaks the DASD driver on s390. We expect the block requests to be > >multiple > >of 4k in size. With the patch applied I see the requests split up in > >multiple > >of 512 byte and therefore the requests get rejected and lots of I/Os fail. > > Sigh, that's definitely a bug. I'll take a look at it and see if I > can get a tested fix in for 4.5-rc1. If not, we'll revert it, again. My apologies for the trouble. I trust it really is broken, but I don't quite see how. The patch supposedly splits the transfer to the max size the request queue says it allows. How does the max allowed size end up an invalid multiple? -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
