Re: [PATCH v2] nvme-multipath: set BIO_REMAPPED on bios remapped to per-path namespace disks

[Keith Busch]

On Thu, May 28, 2026 at 03:24:27PM +0000, Achkinazi, Igor wrote:
> The SRCU read lock prevents synchronize_srcu() from completing, but
> does not prevent set_capacity(0) from executing.  The bio fails the
> EOD check before it reaches the NVMe driver, so nvme_failover_req()
> never gets a chance to redirect it to another path of multipath.  IO errors
> are reported to the application despite another path being available.

I double checked the sequences here, and yes, I think the
synchronize_srcu's already in place ensure every caller sees the EOD
error before it could fail the bio_queue_enter(), so this looks like it
happens to be sufficient. I'm okay with it.