blkmq support

[zenbooster]

Hallo!
https://stackoverflow.com/questions/57166856/accesing-block-device-from-another-blkmq-block-device

I tried to replace "make_request" with "blkmq", and as a result I came to the conclusion that the command

sudo dd if=/dev/urandom of=/dev/mydev0 count=8

works fine, and the command

sudo dd if=/dev/urandom of=/dev/mydev0 count=9

causes the kernel to hang. There is no problem with reading. It feels like my device just stops receiving requests from the system. At the same time, the dd process continues to hang. Why can this happen?

[OrenKishon]

I appologize but I don't remember the details anymore, this is from some years ago. You could post this question as a comment in the blog, other readers might answer your question. Good luck

…

On Tue, Oct 1, 2019, 09:17 zenbooster ***@***.***> wrote: Hallo! https://stackoverflow.com/questions/57166856/accesing-block-device-from-another-blkmq-block-device <http://url> I tried to replace "make_request" with "blkmq", and as a result I came to the conclusion that the command sudo dd if=/dev/urandom of=/dev/mydev0 count=8 works fine, and the command sudo dd if=/dev/urandom of=/dev/mydev0 count=9 causes the kernel to hang. There is no problem with reading. It feels like my device just stops receiving requests from the system. At the same time, the dd process continues to hang. Why can this happen? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AANXB7XVJGKIHBZGDRXHTGLQMMBTNA5CNFSM4I4GA3CKYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4HOYUPZQ>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AANXB7RKWRBTUX47HUIHWLDQMMBTNANCNFSM4I4GA3CA> .