The patch titled
Subject: mm: don't track number of pages during deferred initialization
has been added to the -mm tree. Its filename is
mm-dont-track-number-of-pages-during-deferred-initialization.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-dont-track-number-of-pages-during-deferred-initialization.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-dont-track-number-of-pages-during-deferred-initialization.patch
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------------------------------------------------------
From: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
Subject: mm: don't track number of pages during deferred initialization
Deferred page init used to report the number of pages initialized:
node 0 initialised, 32439114 pages in 97ms
Tracking this makes the code more complicated when using multiple threads.
Given that the statistic probably has limited value, especially since a
zone grows on demand so that the page count can vary, just remove it.
The boot message now looks like
node 0 deferred pages initialised in 97ms
Link: http://lkml.kernel.org/r/20200527173608.2885243-6-daniel.m.jordan@xxxxxxxxxx
Signed-off-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
Suggested-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>
Cc: Alex Williamson <alex.williamson@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Robert Elliott <elliott@xxxxxxx>
Cc: Shile Zhang <shile.zhang@xxxxxxxxxxxxxxxxx>
Cc: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Cc: Steven Sistare <steven.sistare@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/mm/page_alloc.c~mm-dont-track-number-of-pages-during-deferred-initialization
+++ a/mm/page_alloc.c
@@ -1820,7 +1820,7 @@ static int __init deferred_init_memmap(v
{
pg_data_t *pgdat = data;
const struct cpumask *cpumask = cpumask_of_node(pgdat->node_id);
- unsigned long spfn = 0, epfn = 0, nr_pages = 0;
+ unsigned long spfn = 0, epfn = 0;
unsigned long first_init_pfn, flags;
unsigned long start = jiffies;
struct zone *zone;
@@ -1869,15 +1869,15 @@ static int __init deferred_init_memmap(v
* allocator.
*/
while (spfn < epfn) {
- nr_pages += deferred_init_maxorder(&i, zone, &spfn, &epfn);
+ deferred_init_maxorder(&i, zone, &spfn, &epfn);
cond_resched();
}
zone_empty:
/* Sanity check that the next zone really is unpopulated */
WARN_ON(++zid < MAX_NR_ZONES && populated_zone(++zone));
- pr_info("node %d initialised, %lu pages in %ums\n",
- pgdat->node_id, nr_pages, jiffies_to_msecs(jiffies - start));
+ pr_info("node %d deferred pages initialised in %ums\n",
+ pgdat->node_id, jiffies_to_msecs(jiffies - start));
pgdat_init_report_one_done();
return 0;
_
Patches currently in -mm which might be from daniel.m.jordan@xxxxxxxxxx are
mm-call-touch_nmi_watchdog-on-max-order-boundaries-in-deferred-init.patch
padata-remove-exit-routine.patch
padata-initialize-earlier.patch
padata-allocate-work-structures-for-parallel-jobs-from-a-pool.patch
padata-add-basic-support-for-multithreaded-jobs.patch
mm-dont-track-number-of-pages-during-deferred-initialization.patch
mm-parallelize-deferred_init_memmap.patch
mm-make-deferred-inits-max-threads-arch-specific.patch
padata-document-multithreaded-jobs.patch
