Re: [PATCH v6] nvme: reject passthrough of driver-managed Set Features

Chris S <[email protected]> Tue, 11 Aug 2026 11:22:14 -0400

Newsgroups	org.infradead.lists.linux-nvme,org.kernel.vger.linux-kernel
Message-ID	<CACd_6n0KK=KnTdbnWtaanpcdpP-DOs=r0n=UScZM6WQP4K2Kig@mail.gmail.com>

Thank you so much!

Best,
Chao

On Mon, Aug 10, 2026 at 7:13 PM Keith Busch <[email protected]> wrote:
>
> On Wed, Jul 15, 2026 at 11:57:52AM -0400, Chao Shi wrote:
> > Since commit b58da2d270db ("nvme: update keep alive interval when kato
> > is modified"), a Set Features (KATO) passthrough command lets userspace
> > start keep-alive on any transport. nvme_keep_alive_work() allocates with
> > BLK_MQ_REQ_RESERVED, but nvme_alloc_admin_tag_set() reserves admin tags
> > only for fabrics, so on other transports the allocation trips
> > WARN_ON_ONCE() in blk_mq_get_tag() and fails:
>
> Thanks, applied to nvme-7.3.