2017-02-28 20:42 GMT+01:00 Shaohua Li <shli@xxxxxxxxxx>: > On Fri, Feb 24, 2017 at 11:19:05AM +0100, 王金浦 wrote: >> Hi Coly, Hi Shaohua, >> >> >> > >> > Hi Shaohua, >> > >> > I try to catch up with you, let me try to follow your mind by the >> > split-in-while-loop condition (this is my new I/O barrier patch). I >> > assume the original BIO is a write bio, and original bio is split and >> > handled in a while loop in raid1_make_request(). >> >> It's still possible for read bio. We hit a deadlock in the past. >> See https://patchwork.kernel.org/patch/9498949/ >> >> Also: >> http://www.spinics.net/lists/raid/msg52792.html > > Thanks Jinpu. So this is for the read side, where we don't have plug stuff. > Yep, that finally makes sense. It's my fault I didn't look at the read side > code carefully. Looks we need the patch Neil suggested. > > Thanks, > Shaohua Thanks Shaohua, I will test your patch and report result. Regards, Jinpu -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
