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 246F47E0FF; Mon, 8 Apr 2024 13:49:46 +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=1712584186; cv=none; b=Y1VscTBiFD5taGzXVgFq34D71BQ8R8/zI0xTjUTtsp9H0OOYkC2Tz6wGsFJkpxWYw++BLOiBCJTVVpxul2jkmyu2KlFSuSJdlAh5Mz2w7NvTH7eNigqioNtkyTBG4mUYc6K3KCsMFdxQi9ha6wJF8PBm4xyTd9sVG/Y5zmVwh8Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712584186; c=relaxed/simple; bh=fvhyzk37/xg1CuddytbcU4shU5GJDzSLk4cMdoTBHyo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e7Y2QlVVhEI0dA/Y1O9YRMhS/WWjWoKkOVk6KWsS26oMCsHqrezCGwC3RUprDI/aigvNt0mho2UVo9lgzgj/OzvhZ74wfl1+rq3BNYCcwK2sGYuVGMtRcXqHSzAnGPLHlgGBSSl1eDx6+I3A8au2h3bO1aB6+p9DCHEkKN4v/bk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wRm1x+5C; 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="wRm1x+5C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1302C433F1; Mon, 8 Apr 2024 13:49:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712584186; bh=fvhyzk37/xg1CuddytbcU4shU5GJDzSLk4cMdoTBHyo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wRm1x+5CzeM5ZpvppPbdAsvKj6HOhgxYB4CMARsGOi2jSXqoHhanXXDxqp9GFOqcD TDE2LknJM3uhVIjOtuvuINLLaxyWNhQGIM8nwNfjexeeewqAayxSACNRYIEU518d53 WcajlZR527fZ8ULttKa8Y0U2qwgOzdqH8vXupu1w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeff Layton , Chuck Lever Subject: [PATCH 5.15 353/690] NFSD: Report the number of items evicted by the LRU walk Date: Mon, 8 Apr 2024 14:53:39 +0200 Message-ID: <20240408125412.393707731@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 94660cc19c75083af046b0f8362e3d3bc2eba21d ] Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- fs/nfsd/filecache.c | 13 ++++++++++--- fs/nfsd/trace.h | 29 +++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+), 3 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 1d94491e5ddad..e5bd9f06492c8 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -45,6 +45,7 @@ static DEFINE_PER_CPU(unsigned long, nfsd_file_cache_hits); static DEFINE_PER_CPU(unsigned long, nfsd_file_acquisitions); static DEFINE_PER_CPU(unsigned long, nfsd_file_releases); static DEFINE_PER_CPU(unsigned long, nfsd_file_total_age); +static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions); struct nfsd_fcache_disposal { struct work_struct work; @@ -445,6 +446,7 @@ nfsd_file_lru_cb(struct list_head *item, struct list_lru_one *lru, goto out_skip; list_lru_isolate_move(lru, &nf->nf_lru, head); + this_cpu_inc(nfsd_file_evictions); return LRU_REMOVED; out_skip: return LRU_SKIP; @@ -475,9 +477,11 @@ static void nfsd_file_gc(void) { LIST_HEAD(dispose); + unsigned long ret; - list_lru_walk(&nfsd_file_lru, nfsd_file_lru_cb, - &dispose, LONG_MAX); + ret = list_lru_walk(&nfsd_file_lru, nfsd_file_lru_cb, + &dispose, LONG_MAX); + trace_nfsd_file_gc_removed(ret, list_lru_count(&nfsd_file_lru)); nfsd_file_gc_dispose_list(&dispose); } @@ -502,6 +506,7 @@ nfsd_file_lru_scan(struct shrinker *s, struct shrink_control *sc) ret = list_lru_shrink_walk(&nfsd_file_lru, sc, nfsd_file_lru_cb, &dispose); + trace_nfsd_file_shrinker_removed(ret, list_lru_count(&nfsd_file_lru)); nfsd_file_gc_dispose_list(&dispose); return ret; } @@ -1064,7 +1069,7 @@ 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, releases = 0; + unsigned long hits = 0, acquisitions = 0, releases = 0, evictions = 0; unsigned int i, count = 0, longest = 0; unsigned long lru = 0, total_age = 0; @@ -1088,6 +1093,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) acquisitions += per_cpu(nfsd_file_acquisitions, i); releases += per_cpu(nfsd_file_releases, i); total_age += per_cpu(nfsd_file_total_age, i); + evictions += per_cpu(nfsd_file_evictions, i); } seq_printf(m, "total entries: %u\n", count); @@ -1096,6 +1102,7 @@ static int nfsd_file_cache_stats_show(struct seq_file *m, void *v) seq_printf(m, "cache hits: %lu\n", hits); seq_printf(m, "acquisitions: %lu\n", acquisitions); seq_printf(m, "releases: %lu\n", releases); + seq_printf(m, "evictions: %lu\n", evictions); if (releases) seq_printf(m, "mean age (ms): %ld\n", total_age / releases); else diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index 593218d8a54d0..71919f7a31dc8 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -894,6 +894,35 @@ TRACE_EVENT(nfsd_file_fsnotify_handle_event, __entry->nlink, __entry->mode, __entry->mask) ); +DECLARE_EVENT_CLASS(nfsd_file_lruwalk_class, + TP_PROTO( + unsigned long removed, + unsigned long remaining + ), + TP_ARGS(removed, remaining), + TP_STRUCT__entry( + __field(unsigned long, removed) + __field(unsigned long, remaining) + ), + TP_fast_assign( + __entry->removed = removed; + __entry->remaining = remaining; + ), + TP_printk("%lu entries removed, %lu remaining", + __entry->removed, __entry->remaining) +); + +#define DEFINE_NFSD_FILE_LRUWALK_EVENT(name) \ +DEFINE_EVENT(nfsd_file_lruwalk_class, name, \ + TP_PROTO( \ + unsigned long removed, \ + unsigned long remaining \ + ), \ + TP_ARGS(removed, remaining)) + +DEFINE_NFSD_FILE_LRUWALK_EVENT(nfsd_file_gc_removed); +DEFINE_NFSD_FILE_LRUWALK_EVENT(nfsd_file_shrinker_removed); + #include "cache.h" TRACE_DEFINE_ENUM(RC_DROPIT); -- 2.43.0