From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 83B3B27057D; Tue, 13 Jan 2026 19:31:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768332718; cv=none; b=faOXGAp3e1BuSisiXsJc1JasSApje8AqXBQY2VzfLmYhycHWHMOKBm+XosdsHlu7JuriYPnNh5ssrv1fwyaxPXZcwKsdO8bOhm3ZNE6kcXQfqbCBe4LuOkFJUYvYh/0CGomdXCvI9ir5xXw+7BzzfWYR7BNXKHWaAnBEdT0acdA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768332718; c=relaxed/simple; bh=79b4fMHkFtfBmpT2vQxNYhV0JtYrchY9cG+0aP1BFHc=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=oNLbC7gd9DsQANxq05QBkPn3o6FVof5HKixoLGwGmIPKj0kZHhigfB+Q1ZkQteCnROTLAqAl+BsGxwkKacPR28YarxdLPvIkPb2LFKgdlYYMCHtAd+Q6HgMxJUkavnCCMI1a17Eci4DNQBs+FVsnB32hEaV0SintQqGWUXSR/JE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Iq0/2qOO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Iq0/2qOO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 122CDC116C6; Tue, 13 Jan 2026 19:31:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768332718; bh=79b4fMHkFtfBmpT2vQxNYhV0JtYrchY9cG+0aP1BFHc=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Iq0/2qOOzebdHSt1uVFiHha5WV8GOZ23nVzME2OKRzRkhLE5AM1rBL7vdmWg5dQ8X 4GzZX1PGDaCjx+SJ4vqIBuJxp+6VGelC/O5T0/B+XpCiCL/u6Q7Z/mhzqi5rfjE7f9 zFGWXy9rOJYw8WEusqVdZceX+9mGuGAJzKNgGNxuEATRi6wfZznBNHMsou89x9cAUv 1/gF1Chs4Rvo2jdPxdjGgzpbH4UxNIeMDHZK/LQoWBtsh1YyKllkIogrut9FrLtzUA eKmcQzP/AT1TwdbumZZTO4MpQFQSnz8H9vyChxcXer2vrkPcj7zoT9bNZVML+XKWVU xdC63hTszYkzw== Message-ID: <71ddafd443a0e13f79cea09ba2b3ac4f106163ce.camel@kernel.org> Subject: Re: [PATCH 1/2] nfsd/sunrpc: add svc_rqst->rq_private pointer and remove rq_lease_breaker From: Jeff Layton To: Chuck Lever , Chuck Lever , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Trond Myklebust , Anna Schumaker Cc: Benjamin Coddington , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 13 Jan 2026 14:31:55 -0500 In-Reply-To: <5806015a-ad18-4bc9-a320-2fdab4d86969@app.fastmail.com> References: <20260113-rq_private-v1-0-88ed308364e6@kernel.org> <20260113-rq_private-v1-1-88ed308364e6@kernel.org> <5806015a-ad18-4bc9-a320-2fdab4d86969@app.fastmail.com> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw 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Evolution 3.58.2 (3.58.2-1.fc43) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2026-01-13 at 14:21 -0500, Chuck Lever wrote: >=20 > On Tue, Jan 13, 2026, at 1:37 PM, Jeff Layton wrote: > > diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c > > index eee8c3f4a251a3fae6e41679de0ec34c76caf198..8ce366c9e49220e8baf475c= 2e5f3424fedc1cec1 100644 > > --- a/fs/nfsd/nfssvc.c > > +++ b/fs/nfsd/nfssvc.c > > @@ -900,6 +900,7 @@ nfsd(void *vrqstp) > > struct svc_xprt *perm_sock =3D list_entry(rqstp->rq_server->sv_permsock= s.next, typeof(struct svc_xprt), xpt_list); > > struct net *net =3D perm_sock->xpt_net; > > struct nfsd_net *nn =3D net_generic(net, nfsd_net_id); > > + struct nfsd_thread_local_info ntli =3D { }; > > bool have_mutex =3D false; > > =20 > > /* At this point, the thread shares current->fs > > @@ -914,6 +915,8 @@ nfsd(void *vrqstp) > > =20 > > set_freezable(); > > =20 > > + rqstp->rq_private =3D &ntli; > > + > > /* > > * The main request loop > > */ >=20 > Thanks for tackling this one. Nits below... >=20 > This assumes sizeof(structure nfsd_thread_local_info) will always > be small enough that it is reasonable to keep on the stack. I > can't say that would be a good bet in the long run. >=20 > And we don't need the perfect reliability of not doing a dynamic > allocation here. If kmalloc(sizeof(struct nfsd_thread_local_info)) > fails, the thread exits immediately, no harm. >=20 Not sure how much space Ben will need (if any). We certainly could have nfsd allocate this separately. I didn't see the point for something that is only a few bytes though. > Also, scatter-gather lists could not be stored directly in this > object because it is on the stack. If Ben wanted to stick a > 32-byte buffer in struct nfsd_thread_local_info to be used with > the crypto API, it would have to be a pointer to it, not the > buffer itself. >=20 *nod* --=20 Jeff Layton