linux-kernel - Re: [PATCH 0/4] allow multiple kthreadd's

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Message-ID: <20200501190223.GF9191@pick.fieldses.org>
Date:   Fri, 1 May 2020 15:02:23 -0400
From:   "J. Bruce Fields" <bfields@...hat.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Tejun Heo <tj@...nel.org>,
        "open list:NFS, SUNRPC, AND..." <linux-nfs@...r.kernel.org>,
        Jeff Layton <jlayton@...hat.com>,
        David Howells <dhowells@...hat.com>, Shaohua Li <shli@...com>,
        Oleg Nesterov <oleg@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] allow multiple kthreadd's

On Fri, May 01, 2020 at 11:30:38AM -0700, Linus Torvalds wrote:
> On Fri, May 1, 2020 at 11:22 AM Tejun Heo <tj@...nel.org> wrote:
> >
> > Looks fine to me too. I don't quite understand the usecase tho. It looks
> > like all it's being used for is to tag some kthreads as belonging to the
> > same group. Can't that be done with kthread_data()?
> 
> I _think_ Bruce wants the signal handling unification too, because
> nfsd wants to react to being shut down with signals.

No, maybe kthread_data() might do the job.

(I don't see how this would help with signal handling.  But, I'm kind of
ignorant of how signalling works.)

--b.