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Date: Fri, 1 May 2020 15:22:19 -0400 From: "J. Bruce Fields" <bfields@...hat.com> To: Trond Myklebust <trondmy@...merspace.com> Cc: "tj@...nel.org" <tj@...nel.org>, "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>, "jlayton@...hat.com" <jlayton@...hat.com>, "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>, "shli@...com" <shli@...com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "dhowells@...hat.com" <dhowells@...hat.com>, "oleg@...hat.com" <oleg@...hat.com> Subject: Re: [PATCH 0/4] allow multiple kthreadd's On Fri, May 01, 2020 at 07:05:46PM +0000, Trond Myklebust wrote: > On Fri, 2020-05-01 at 14:49 -0400, J. Bruce Fields wrote: > > On Fri, May 01, 2020 at 02:21:54PM -0400, Tejun Heo wrote: > > > Hello, > > > > > > On Fri, May 01, 2020 at 10:59:24AM -0700, Linus Torvalds wrote: > > > > Which kind of makes me want to point a finger at Tejun. But it's > > > > been > > > > mostly PeterZ touching this file lately.. > > > > > > 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. > > > > Pretty much. > > Wen running an instance of knfsd from inside a container, you want to > be able to have the knfsd kthreads be parented to the container init > process so that they get killed off when the container is killed. > > Right now, we can easily leak those kernel threads simply by killing > the container. Oh, got it. Currently knfsd supports nfs service in containers, but it uses a single set of threads to serve requests from any container. It should shut the server threads down when the last container using them goes away. --b.
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