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 7E5F520896D for ; Mon, 3 Feb 2025 15:11:44 +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=1738595504; cv=none; b=ErbcgaZu+13IlxVCUc4Am4a0FiN48PYh0wtKCQ7IgUKNpO0IbONQeUCDxJX5N0ohp6TOd4kR3B/BXRJgWCobqhkkbIq/XRftN8gzjBlzx7LSE80s+RdzV6ygqvZs1hlZKuxuikhrIDWv7zqa36/1mXP5ZVcWw/QuLX3RKGEOcUU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738595504; c=relaxed/simple; bh=kFXVmcySr6lES7Jv3fjBrsqHd2My3f3AQUUwjqs6nkw=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=Zuc4uw/k5GD9cWzaJWEKt8VH+LHwEktskDgFzGVc+N3Pru0mLp2HMoH0NXaPSx1Fxh3bwNl2djGU6ArsYB8T1QlBBItdCVtYkAzhp6MstwxUrq4nT9dsxsnYlTGUJ+2zsPTBCxaYZONII0Wqw+bELIfCrOU3OwBUOTD2urfEl1o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gtIyKgZb; 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="gtIyKgZb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 61062C4CED2; Mon, 3 Feb 2025 15:11:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1738595504; bh=kFXVmcySr6lES7Jv3fjBrsqHd2My3f3AQUUwjqs6nkw=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=gtIyKgZbfnh8fQeajaPhuMFjjCDffRegQvijjlFwBkzd2dp8lmre37Fs8cBTS/582 W22E4hBDikfWenqnIpm3CtyYV7MwhHbPjWlSB/nCI2mukxQgxU2t+3QXBQgB+RUo7N Uv5BDT1/SfU4DBCUWonKypGcTbDt0VkCEHgrF7SLuJAWcI5ofpENc9PSxh4BqR12bg gTrTpq7bLRMAVeejZLZ6M6CcCR3rgaCxa0ojQaeWYjXYO72e+bvfc+aIIv9i8D4DVB Yp8h2odNTv2i9RtfXLD1Kf63LobIY7xPxLg7vYjRgUXJ8QNyaHInHU5IPtNXQXx8hX 0pl4INvR9Karw== Message-ID: <9adf2944956561ff70580e85bfbbb093bb73cc9e.camel@kernel.org> Subject: Re: [PATCH] NFSD: Fix trace_nfsd_slot_seqid_sequence From: Jeff Layton To: cel@kernel.org, Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey Cc: linux-nfs@vger.kernel.org, Chuck Lever Date: Mon, 03 Feb 2025 10:11:41 -0500 In-Reply-To: <20250203144942.68547-1-cel@kernel.org> References: <20250203144942.68547-1-cel@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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While running down the problem triggered by disconnect injection, > I noticed the "in use" string was actually never hooked up in this > trace point, so it always showed the traced slot as not in use. But > what might be more useful is showing all the slot status flags. >=20 > Also, this trace point can record and report the slot's index > number, which among other things is useful for troubleshooting slot > table expansion and contraction. >=20 > Signed-off-by: Chuck Lever > --- > fs/nfsd/trace.h | 19 +++++++++++++++---- > 1 file changed, 15 insertions(+), 4 deletions(-) >=20 > diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h > index ad2c0c432d08..49bbd26ffcdb 100644 > --- a/fs/nfsd/trace.h > +++ b/fs/nfsd/trace.h > @@ -803,6 +803,14 @@ DEFINE_EVENT(nfsd_cs_slot_class, nfsd_##name, \ > DEFINE_CS_SLOT_EVENT(slot_seqid_conf); > DEFINE_CS_SLOT_EVENT(slot_seqid_unconf); > =20 > +#define show_nfs_slot_flags(val) \ > + __print_flags(val, "|", \ > + { NFSD4_SLOT_INUSE, "INUSE" }, \ > + { NFSD4_SLOT_CACHETHIS, "CACHETHIS" }, \ > + { NFSD4_SLOT_INITIALIZED, "INITIALIZED" }, \ > + { NFSD4_SLOT_CACHED, "CACHED" }, \ > + { NFSD4_SLOT_REUSED, "REUSED" }) > + > TRACE_EVENT(nfsd_slot_seqid_sequence, > TP_PROTO( > const struct nfs4_client *clp, > @@ -813,10 +821,11 @@ TRACE_EVENT(nfsd_slot_seqid_sequence, > TP_STRUCT__entry( > __field(u32, seqid) > __field(u32, slot_seqid) > + __field(u32, slot_index) > + __field(unsigned long, slot_flags) > __field(u32, cl_boot) > __field(u32, cl_id) > __sockaddr(addr, clp->cl_cb_conn.cb_addrlen) > - __field(bool, in_use) > ), > TP_fast_assign( > __entry->cl_boot =3D clp->cl_clientid.cl_boot; > @@ -825,11 +834,13 @@ TRACE_EVENT(nfsd_slot_seqid_sequence, > clp->cl_cb_conn.cb_addrlen); > __entry->seqid =3D seq->seqid; > __entry->slot_seqid =3D slot->sl_seqid; > + __entry->slot_index =3D seq->slotid; > + __entry->slot_flags =3D slot->sl_flags; > ), > - TP_printk("addr=3D%pISpc client %08x:%08x seqid=3D%u slot_seqid=3D%u (%= sin use)", > + TP_printk("addr=3D%pISpc client %08x:%08x idx=3D%u seqid=3D%u slot_seqi= d=3D%u flags=3D%s", > __get_sockaddr(addr), __entry->cl_boot, __entry->cl_id, > - __entry->seqid, __entry->slot_seqid, > - __entry->in_use ? "" : "not " > + __entry->slot_index, __entry->seqid, __entry->slot_seqid, > + show_nfs_slot_flags(__entry->slot_flags) > ) > ); > =20 Reviewed-by: Jeff Layton