The quilt patch titled
Subject: memory tiers: use default_dram_perf_ref_source in log message
has been removed from the -mm tree. Its filename was
memory-tiers-use-default_dram_perf_ref_source-in-log-message.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Huang Ying <ying.huang@xxxxxxxxx>
Subject: memory tiers: use default_dram_perf_ref_source in log message
Date: Fri, 20 Sep 2024 09:47:40 +0800
Commit 3718c02dbd4c ("acpi, hmat: calculate abstract distance with HMAT")
added a default_dram_perf_ref_source variable that was initialized but
never used. This causes kmemleak to report the following memory leak:
unreferenced object 0xff11000225a47b60 (size 16):
comm "swapper/0", pid 1, jiffies 4294761654
hex dump (first 16 bytes):
41 43 50 49 20 48 4d 41 54 00 c1 4b 7d b7 75 7c ACPI HMAT..K}.u|
backtrace (crc e6d0e7b2):
[<ffffffff95d5afdb>] __kmalloc_node_track_caller_noprof+0x36b/0x440
[<ffffffff95c276d6>] kstrdup+0x36/0x60
[<ffffffff95dfabfa>] mt_set_default_dram_perf+0x23a/0x2c0
[<ffffffff9ad64733>] hmat_init+0x2b3/0x660
[<ffffffff95203cec>] do_one_initcall+0x11c/0x5c0
[<ffffffff9ac9cfc4>] do_initcalls+0x1b4/0x1f0
[<ffffffff9ac9d52e>] kernel_init_freeable+0x4ae/0x520
[<ffffffff97c789cc>] kernel_init+0x1c/0x150
[<ffffffff952aecd1>] ret_from_fork+0x31/0x70
[<ffffffff9520b18a>] ret_from_fork_asm+0x1a/0x30
This reminds us that we forget to use the performance data source
information. So, use the variable in the error log message to help
identify the root cause of inconsistent performance number.
Link: https://lkml.kernel.org/r/87y13mvo0n.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 3718c02dbd4c ("acpi, hmat: calculate abstract distance with HMAT")
Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Reported-by: Waiman Long <longman@xxxxxxxxxx>
Acked-by: Waiman Long <longman@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-tiers.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/memory-tiers.c~memory-tiers-use-default_dram_perf_ref_source-in-log-message
+++ a/mm/memory-tiers.c
@@ -768,10 +768,10 @@ int mt_set_default_dram_perf(int nid, st
pr_info(
"memory-tiers: the performance of DRAM node %d mismatches that of the reference\n"
"DRAM node %d.\n", nid, default_dram_perf_ref_nid);
- pr_info(" performance of reference DRAM node %d:\n",
- default_dram_perf_ref_nid);
+ pr_info(" performance of reference DRAM node %d from %s:\n",
+ default_dram_perf_ref_nid, default_dram_perf_ref_source);
dump_hmem_attrs(&default_dram_perf, " ");
- pr_info(" performance of DRAM node %d:\n", nid);
+ pr_info(" performance of DRAM node %d from %s:\n", nid, source);
dump_hmem_attrs(perf, " ");
pr_info(
" disable default DRAM node performance based abstract distance algorithm.\n");
_
Patches currently in -mm which might be from ying.huang@xxxxxxxxx are
