Re: [BUG] RCU hang with io_uring nvme polling
Ben Carey <[email protected]>
| Newsgroups | org.kernel.vger.io-uring,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <CA+KFGSp_Gb-pt0YzVDU+OFi0T5XoNj-+QV79Jja=59=gmVzZ=g@mail.gmail.com> |
On Fri, Jun 26, 2026 at 12:48 PM Keith Busch <[email protected]> wrote: > > On Fri, Jun 26, 2026 at 10:35:56AM -0600, Jens Axboe wrote: > > Yes, it's a bad configuration. I bet it's as simple as: > > > > https://lore.kernel.org/linux-block/[email protected]/ > > Yep, that's definitely the same problem. Thanks, I hadn't seen that > thread yet. (Resending this, didn't enable plain-text mode) Jens, Keith, I appreciate you both for the quick responses. After putting that patch into the kernel, the fio job ran, but most of the I/O's completed after about 2 milliseconds (makes sense, given the offset.) Part of me wonders if there's a race between the NVMe driver and the hardware controller, but I can't back this up right now. Ben Carey