linux-kernel - [PATCH 4/4] tools/vm/slabinfo: Add sorting info to help menu

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Message-Id: <20190426022622.4089-5-tobin@kernel.org>
Date:   Fri, 26 Apr 2019 12:26:22 +1000
From:   "Tobin C. Harding" <tobin@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "Tobin C. Harding" <tobin@...nel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Pekka Enberg <penberg@....fi>,
        Vlastimil Babka <vbabka@...e.cz>,
        Christoph Lameter <cl@...ux.com>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Tejun Heo <tj@...nel.org>, Qian Cai <cai@....pw>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Michal Hocko <mhocko@...nel.org>,
        Brendan Gregg <brendan.d.gregg@...il.com>, linux-mm@...ck.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] tools/vm/slabinfo: Add sorting info to help menu

Passing more than one sorting option has undefined behaviour.

Add an explicit statement as such to the help menu, this also has the
advantage of highlighting all the sorting options.

Signed-off-by: Tobin C. Harding <tobin@...nel.org>
---
 tools/vm/slabinfo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
index 469ff6157986..68092d15e12b 100644
--- a/tools/vm/slabinfo.c
+++ b/tools/vm/slabinfo.c
@@ -148,6 +148,8 @@ static void usage(void)
 		"    p | P              Poisoning\n"
 		"    u | U              Tracking\n"
 		"    t | T              Tracing\n"
+
+		"\nSorting options (--Loss, --Size, --Partial) are mutually exclusive\n"
 	);
 }
 
-- 
2.21.0