linux-kernel - [PATCH] mm/slab: Add slabreclaim flag to slabinfo

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Message-ID: <20240131084949.449740-1-chunyan.zhang@unisoc.com>
Date: Wed, 31 Jan 2024 16:49:49 +0800
From: Chunyan Zhang <chunyan.zhang@...soc.com>
To: Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>,
        David
 Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew
 Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman
 Gushchin <roman.gushchin@...ux.dev>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>
CC: <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        Fangzheng Zhang
	<fangzheng.zhang@...soc.com>,
        Fangzheng Zhang
	<fangzheng.zhang1003@...il.com>,
        Yuming Han <yuming.han@...soc.com>,
        Chunyan
 Zhang <zhang.lyra@...il.com>
Subject: [PATCH] mm/slab: Add slabreclaim flag to slabinfo

From: Fangzheng Zhang <fangzheng.zhang@...soc.com>

In order to enhance slab debugging, we add slabreclaim flag to
slabinfo. Slab type is also an important analysis point in slabinfo
for per slab, when various problems such as memory leaks or memory
statistics occur.

Signed-off-by: Fangzheng Zhang <fangzheng.zhang@...soc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
---
 mm/slab_common.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 238293b1dbe1..aeeb2bfe6dda 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1038,7 +1038,7 @@ static void print_slabinfo_header(struct seq_file *m)
        seq_puts(m, "slabinfo - version: 2.1\n");
        seq_puts(m, "# name            <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab>");
        seq_puts(m, " : tunables <limit> <batchcount> <sharedfactor>");
-       seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail>");
+       seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail> <slabreclaim>");
        seq_putc(m, '\n');
 }

@@ -1071,8 +1071,9 @@ static void cache_show(struct kmem_cache *s, struct seq_file *m)

        seq_printf(m, " : tunables %4u %4u %4u",
                   sinfo.limit, sinfo.batchcount, sinfo.shared);
-       seq_printf(m, " : slabdata %6lu %6lu %6lu",
-                  sinfo.active_slabs, sinfo.num_slabs, sinfo.shared_avail);
+       seq_printf(m, " : slabdata %6lu %6lu %6lu %6u",
+                  sinfo.active_slabs, sinfo.num_slabs, sinfo.shared_avail,
+                  !!(s->flags & SLAB_RECLAIM_ACCOUNT));
        slabinfo_show_stats(m, s);
        seq_putc(m, '\n');
 }
--
2.43.0

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