The quilt patch titled
Subject: mm: hugetlb: log time needed to allocate hugepages
has been removed from the -mm tree. Its filename was
mm-hugetlb-log-time-needed-to-allocate-hugepages.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Thomas Prescher <thomas.prescher@xxxxxxxxxxxxxxxxxxxxx>
Subject: mm: hugetlb: log time needed to allocate hugepages
Date: Thu, 27 Feb 2025 23:45:07 +0100
Having this information allows users to easily tune the
hugepages_node_threads parameter.
Link: https://lkml.kernel.org/r/20250227-hugepage-parameter-v2-3-7db8c6dc0453@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Thomas Prescher <thomas.prescher@xxxxxxxxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/mm/hugetlb.c~mm-hugetlb-log-time-needed-to-allocate-hugepages
+++ a/mm/hugetlb.c
@@ -3608,6 +3608,9 @@ static unsigned long __init hugetlb_page
.numa_aware = true
};
+ unsigned long jiffies_start;
+ unsigned long jiffies_end;
+
job.thread_fn = hugetlb_pages_alloc_boot_node;
job.start = 0;
job.size = h->max_huge_pages;
@@ -3635,7 +3638,14 @@ static unsigned long __init hugetlb_page
job.max_threads = hugepage_allocation_threads;
job.min_chunk = h->max_huge_pages / hugepage_allocation_threads;
+
+ jiffies_start = jiffies;
padata_do_multithreaded(&job);
+ jiffies_end = jiffies;
+
+ pr_info("HugeTLB: allocation took %dms with hugepage_allocation_threads=%ld\n",
+ jiffies_to_msecs(jiffies_end - jiffies_start),
+ hugepage_allocation_threads);
return h->nr_huge_pages;
}
_
Patches currently in -mm which might be from thomas.prescher@xxxxxxxxxxxxxxxxxxxxx are
