From patchwork Fri Nov 8 17:32:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13868762 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 3146E2309FD for ; Fri, 8 Nov 2024 17:36:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731087407; cv=none; b=DbqoqUwhn8z0o3iaGzCxVtZud/RODn+JhJjh0aWaOduC4LbDBHlkXG9LTkJcL2zCWTOYb5ISCwzpGXVGKqVgb89sXjHVrJqcGvjv9+4FJN4htJMyke0HTEXG2ob96r1eohPF6mVs4go/qCSLyOfOaKymHT6pTNJBZJRxta2lavs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731087407; c=relaxed/simple; bh=Py06Ff5m2c85n2uHi5fEm6kPZKCWzBfcFnAIEcZ8I5U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Q5/omPehzPwmv5Ke4L9b+7yGrV+lW4+w0+8WRcPsbU6IxL18ibqo//m6uZMyRDA2EA0GNEZWEPxNrFXmxV9vI8gL+FoLJOmb/F6JQzGMwLzLtFnOuYbabhYjJu4kckBC9X5CJnfh8AOizVh7t1MMFepmvEGDazo97B2moEb5tcc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=QxN0axGg; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="QxN0axGg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1731087405; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QCDL9BqA4pDDX31tPDuoaoWVDY2hJyHDwXlxpfOucp0=; b=QxN0axGg6qXdKHctfy4mTbyafEpfHz5aHDYI9iyN0bOaW5zKD7wI8VC92nvMIWrANqmijJ mWAbd8APHFJalC8GNm8pMfKdwoh1SRFGmgodBHwOdaF6KD8wCHDHuY4ATTaDRhFrhZ3o6j dp9A34kznBGsV6ykkL6anme9ROU/rbo= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-222-bt92h9XNNfuuPtpTLYdiAw-1; Fri, 08 Nov 2024 12:36:44 -0500 X-MC-Unique: bt92h9XNNfuuPtpTLYdiAw-1 X-Mimecast-MFC-AGG-ID: bt92h9XNNfuuPtpTLYdiAw Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3A6A8195609F; Fri, 8 Nov 2024 17:36:36 +0000 (UTC) Received: from warthog.procyon.org.uk.com (unknown [10.42.28.231]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id BF7EA1953880; Fri, 8 Nov 2024 17:36:30 +0000 (UTC) From: David Howells To: Christian Brauner , Steve French , Matthew Wilcox Cc: David Howells , Jeff Layton , Gao Xiang , Dominique Martinet , Marc Dionne , Paulo Alcantara , Shyam Prasad N , Tom Talpey , Eric Van Hensbergen , Ilya Dryomov , netfs@lists.linux.dev, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs@lists.linux.dev, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 32/33] afs: Add a tracepoint for afs_read_receive() Date: Fri, 8 Nov 2024 17:32:33 +0000 Message-ID: <20241108173236.1382366-33-dhowells@redhat.com> In-Reply-To: <20241108173236.1382366-1-dhowells@redhat.com> References: <20241108173236.1382366-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: v9fs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Add a tracepoint for afs_read_receive() to allow potential missed wakeups to be debugged. Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org --- fs/afs/file.c | 1 + include/trace/events/afs.h | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/fs/afs/file.c b/fs/afs/file.c index c296efebb491..fc15497608c6 100644 --- a/fs/afs/file.c +++ b/fs/afs/file.c @@ -274,6 +274,7 @@ static void afs_read_receive(struct afs_call *call) state = READ_ONCE(call->state); if (state == AFS_CALL_COMPLETE) return; + trace_afs_read_recv(op, call); while (state < AFS_CALL_COMPLETE && READ_ONCE(call->need_attention)) { WRITE_ONCE(call->need_attention, false); diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h index c52fd83ca9b7..2e92487f3f34 100644 --- a/include/trace/events/afs.h +++ b/include/trace/events/afs.h @@ -1775,6 +1775,36 @@ TRACE_EVENT(afs_make_call, __entry->fid.unique) ); +TRACE_EVENT(afs_read_recv, + TP_PROTO(const struct afs_operation *op, const struct afs_call *call), + + TP_ARGS(op, call), + + TP_STRUCT__entry( + __field(unsigned int, rreq) + __field(unsigned int, sreq) + __field(unsigned int, op) + __field(unsigned int, op_flags) + __field(unsigned int, call) + __field(enum afs_call_state, call_state) + ), + + TP_fast_assign( + __entry->op = op->debug_id; + __entry->sreq = op->fetch.subreq->debug_index; + __entry->rreq = op->fetch.subreq->rreq->debug_id; + __entry->op_flags = op->flags; + __entry->call = call->debug_id; + __entry->call_state = call->state; + ), + + TP_printk("R=%08x[%x] OP=%08x c=%08x cs=%x of=%x", + __entry->rreq, __entry->sreq, + __entry->op, + __entry->call, __entry->call_state, + __entry->op_flags) + ); + #endif /* _TRACE_AFS_H */ /* This part must be outside protection */