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 263596A352; Mon, 8 Apr 2024 13:51:14 +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=1712584274; cv=none; b=rPyhJmJB9vFNJdyDuKopSe0WeehU+QRSjJxzfmdZmRodlnk844OlaEK49RE7ecnnjbBvt/ZRYWnGaj/Fq8GdAt7i4buYEoH2AzCo6yEZGAc1FI4ZnKk9wbQeNcwlWivwFjlX6OM364LKxHGqJOr6mSrxmdp2wn8CpXI4538LCWU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712584274; c=relaxed/simple; bh=atHFKKnQZbeJzJtHdKYEYlRt3PurPUys0b37p/TbpFk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XbqvZS0Sda61OGNBeRNqZRTxFMCPZusE77usNXfm0VSQ1UZAROgQJACkn2nO7o5O9S6lenLhqSsp/GbD4rYpJXm1rgvuQApK2JVeJ8f/FDbRvatcOtPxCxwQ782vgQm+5/KhDXH2gL9zci9qSQW5ZW7Hm+51J+f/dwf/nnstJpw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=isd2qGlj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="isd2qGlj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A251BC433C7; Mon, 8 Apr 2024 13:51:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712584274; bh=atHFKKnQZbeJzJtHdKYEYlRt3PurPUys0b37p/TbpFk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=isd2qGljJTvp5Png6XZaMJM817kdFVObuE2FiKD3MX8W7CMiOPh/gKFT6fazwgZ0c V5wItPYaHeJRLOs1kvyoQ15HYNIxG/CHIlW5yOS3naaMFv1erQMGHSVz8pE3pxaRP2 hxXrXFZdy1XMXU4R6L6dxXeaOfU9gfMtukA1irJ4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeff Layton , Chuck Lever Subject: [PATCH 5.15 347/690] NFSD: Report count of calls to nfsd_file_acquire() Date: Mon, 8 Apr 2024 14:53:33 +0200 Message-ID: <20240408125412.172866983@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408125359.506372836@linuxfoundation.org> References: <20240408125359.506372836@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chuck Lever [ Upstream commit 29d4bdbbb910f33d6058d2c51278f00f656df325 ] Count the number of successful acquisitions that did not create a file (ie, acquisitions that do not result in a compulsory cache miss). This count can be compared directly with the reported hit count to compute a hit ratio. Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 377d8211200ff..5a09b76ae25a8 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -42,6 +42,7 @@ struct nfsd_fcache_bucket { }; static DEFINE_PER_CPU(unsigned long, nfsd_file_cache_hits); +static DEFINE_PER_CPU(unsigned long, nfsd_file_acquisitions); struct nfsd_fcache_disposal { struct work_struct work; @@ -954,6 +955,8 @@ nfsd_do_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp, status = nfserrno(nfsd_open_break_lease(file_inode(nf->nf_file), may_flags)); out: if (status == nfs_ok) { + if (open) + this_cpu_inc(nfsd_file_acquisitions); *pnf = nf; } else { nfsd_file_put(nf); @@ -1046,8 +1049,9 @@ nfsd_file_create(struct svc_rqst *rqstp, struct svc_fh *fhp, */ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) { + unsigned long hits = 0, acquisitions = 0; unsigned int i, count = 0, longest = 0; - unsigned long lru = 0, hits = 0; + unsigned long lru = 0; /* * No need for spinlocks here since we're not terribly interested in @@ -1064,13 +1068,16 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) } mutex_unlock(&nfsd_mutex); - for_each_possible_cpu(i) + for_each_possible_cpu(i) { hits += per_cpu(nfsd_file_cache_hits, i); + acquisitions += per_cpu(nfsd_file_acquisitions, i); + } seq_printf(m, "total entries: %u\n", count); seq_printf(m, "longest chain: %u\n", longest); seq_printf(m, "lru entries: %lu\n", lru); seq_printf(m, "cache hits: %lu\n", hits); + seq_printf(m, "acquisitions: %lu\n", acquisitions); return 0; } -- 2.43.0