Re: [PATCH 0/2] block: Allow concurrent BB context changes

[Michael Tokarev]

02.02.2024 17:47, Hanna Czenczek :
> Hi,
>
> Without the AioContext lock, a BB's context may kind of change at any
> time (unless it has a root node, and I/O requests are pending).  That
> also means that its own context (BlockBackend.ctx) and that of its root
> node can differ sometimes (while the context is being changed).

How relevant this is for -stable (8.2 at least) which does not have
"scsi: eliminate AioContext lock" patchset, and in particular,:
v8.2.0-124-geaad0fe260 "scsi: only access SCSIDevice->requests from
one thread"?

The issue first patch "block-backend: Allow concurrent context changes"
fixes (RHEL-19381) seems to be for 8.1.something, so it exists in 8.2
too, and this particular fix applies to 8.2.

But with other changes around all this, I'm a bit lost as of what should
be done on stable.  Not even thinking about 7.2 here :)

Thanks,

/mjt