From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 0A44F49CF23 for ; Mon, 21 Sep 2026 13:22:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789996964; cv=none; b=W31wiMXMe7Ry3wINTCrICqQCzb4xDV7g4J/PShjvOjK3GBCuKioWaxPW6th81D+nZlU0Q7jmgEIzOLY8XSX/WK0RyL1RUvMhgL7diLjutkF9dCN9RV7E6DcDJ5JhQOJekK05fCI8QMVvWp40iW3jF7tJgSCEKolM50CP/vd9arE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789996964; c=relaxed/simple; bh=hWHv3dzxUWZiGjpOALjyHjTOBSHI3Wxt/fd39Z7duuI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=cBhAyQyntjvv7HyCPmx5ATL0IMcpveNUMbagJCGZaFkEzCPrNxM8EPK5OKe1Gsx+JEjgL8UumIEcmJBVRawoGaOtjCyOKNA4hClFt6JwME0jC3y8RMDBzhnslgrAizSjB92vrKweXjxHEAtHbdlK1CIjPifc43AlSssK5dERJnk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OV9OGWNB; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="OV9OGWNB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F2DF1F00899; Mon, 21 Sep 2026 13:22:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789996962; bh=tp5KmtVOwoc3KSitS1pjmIR6x2f1iO50Z0U7QFTRnq0=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=OV9OGWNBJSfiAhRMxhkVQMkhGkAfgzfM9yxHp1lKDiFL87P+36Rc/CpUvojFNYir2 cB52skh5Va7HuMBnJQb4UhqGLOVsCVvJefS+qo//pAtppS7WJl6kn0bk17mDTbAFPO /nat2dwFhz2QRLHHS9t8AiJjMslhqMyIEZSEV+fHzw0Fk1iRyZqV30tg52OkScKXvm aN38upogOMztbGLpjNTr/CyzA7Te1SX7MfZKf/pKOE3NazZcpkLyGICjyOJhjdGBOr 3tTxPc0FaFbtV0lbHpo4I/ESKE1QVWD72qwzYoGb2xvO7jjL1AmXwqangAorEyI5CW yW2ymS1uOI+aQ== From: Chuck Lever Date: Mon, 21 Sep 2026 09:22:30 -0400 Subject: [PATCH v6 04/12] NFSD: Track transport in DRC entries Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260921-duplicate-reply-cache-v6-4-db5e13fd9944@kernel.org> References: <20260921-duplicate-reply-cache-v6-0-db5e13fd9944@kernel.org> In-Reply-To: <20260921-duplicate-reply-cache-v6-0-db5e13fd9944@kernel.org> To: Jeff Layton , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: Rick Macklem , linux-nfs@vger.kernel.org, Chuck Lever X-Mailer: b4 0.16-dev-da966 X-Developer-Signature: v=1; a=openpgp-sha256; l=1241; i=cel@kernel.org; h=from:subject:message-id; bh=hWHv3dzxUWZiGjpOALjyHjTOBSHI3Wxt/fd39Z7duuI=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBqsS+dbTI8xopuRje+DicTQhm3C+c8vrnMkvscA AdOy+Wa4VyJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCarEvnQAKCRAzarMzb2Z/ l5NbEACmfGQP2oLdY7zgIHv+vwy38mD0L/GhzEixzys5tGV/gQLZdqvr946EfT2x8cs4gzMyZlq 0TL+eawq0SnhxMqolRKoAH17ZBFUnNIKprFvpX5ViC2bjkZOo+aDZVzcQsn1VTse7IswYr1t9yJ GTKQaUQcizONDCdjj4dw7GdU1GepQyW6PjdN03lVUQkx2yr6FVWQdicn62a+C+P6B/E5/znEX29 n0f3dnhZQDRKvUCx7QeenIxnM9+kJAiEnEXSjWtSDD7tVzC2KB50jdrySw8gdmwkkv8Ieia+MPP Yg1Fjz3W8Gd+VjvA1ZfurVBSLkXwijz0LIjCqtfBMqpD1f/nGGyH9fID6dWaRW3I7j45yK8KNbU fEIf9Q3QMwWcp53y0UeH1ilTI0lOd84xxrmRxN5IAKY3AXok2/M7bewLq4xX2xLrbERGkpt08WO 25fTlUCwh+4qcDmgUqGSeVU4T/NXFAm7ictcCHI4bamdrU8zXVpxTghb8rY03uuZVYu9nA8GVH7 NNln3v4PMu6GqardCUdI8f201JaB27lAtJX+oiIF8UCbwPc7qHlVKVbe8XQ9RJ5WCJd+5gs2Twq Au2LELwhEzwnCxEpwdZjsRbvyv4S/wpSEGd+uJME1H4fQ70dpLjlgmj5TUz4rp7DqvDfKoKroi5 giijCQ1f6vbi47g== X-Developer-Key: i=cel@kernel.org; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 A cached reply carries no record of the transport its request arrived on. Transport-aware eviction needs that association. Record the xprt id in each entry. struct nfsd_cacherep grows from 128 to 136 bytes. No behavior change. Assisted-by: LLM Signed-off-by: Chuck Lever --- fs/nfsd/cache.h | 1 + fs/nfsd/nfscache.c | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h index 3bc4856e34b8..589ffe4762d5 100644 --- a/fs/nfsd/cache.h +++ b/fs/nfsd/cache.h @@ -37,6 +37,7 @@ struct nfsd_cacherep { unsigned char c_state, /* unused, inprog, done */ c_type, /* status, buffer */ c_secure : 1; /* req came from port < 1024 */ + u64 c_xprt; /* svc_xprt that carried req */ unsigned long c_timestamp; union { struct kvec u_vec; diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 36afe5fbdac5..4207c2e694db 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -111,6 +111,7 @@ nfsd_cacherep_alloc(struct svc_rqst *rqstp, __wsum csum, rp->c_key.k_vers = rqstp->rq_vers; rp->c_key.k_len = rqstp->rq_arg.len; rp->c_key.k_csum = csum; + rp->c_xprt = rqstp->rq_xprt->xpt_id; } return rp; } -- 2.55.0