Re: [PATCH 1/6] workqueue: Inherit NOIO and NOFS alloc flags

Tejun Heo
2024-05-14T16:49:13Z

Hello,

On Tue, May 14, 2024 at 01:48:24PM +0000, Haakon Bugge wrote:
> > Also, this looks like something that the work function can do on entry and
> > before exit, no?
>
> It _can_ be done in the work functions, but that will be a code sprawl.
> Only in RDS, we have the following worker functions:
>
> rds_ib_odp_mr_worker();
> rds_ib_mr_pool_flush_worker()
> rds_ib_odp_mr_worker()
> rds_tcp_accept_worker()
> rds_connect_worker()
> rds_send_worker()
> rds_recv_worker()
> rds_shutdown_worker()
>
> adding the ones from ib_cm, rdma_cm, mlx5_ib, and mlx5_core, I strongly
> prefer to have it in one place.

I haven't seen the code yet, so can't tell for sure but if you're
automatically inherting these flags from the scheduling site, I don't think
that's gonna work. Note that getting a different, more permissive,
allocation context is one of reasons why one might want to use workqueues,
so it'd have to be explicit whether it's in workqueue or in its users.

Thanks.

--
tejun