* + mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch added to mm-new branch
@ 2026-09-15 4:36 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-09-15 4:36 UTC (permalink / raw)
To: mm-commits, urezki, liuye, akpm
The patch titled
Subject: mm/vmalloc: extract show_busy_info from vmalloc_info_show
has been added to the -mm mm-new branch. Its filename is
mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch
This patch will later appear in the mm-new branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews. Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.
The mm-new branch of mm.git is not included in linux-next
If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Ye Liu <liuye@kylinos.cn>
Subject: mm/vmalloc: extract show_busy_info from vmalloc_info_show
Date: Mon, 14 Sep 2026 11:34:02 +0800
Patch series "mm/vmalloc: minor cleanups".
Small cleanup series for mm/vmalloc.c, no functional changes:
- Group xa_init() with the other vmap_block_queue field initializations
in vmalloc_init(), instead of after the unrelated vfree_deferred setup.
- Extract vmap_insert_free_area() helper to deduplicate the allocate-
and-insert pattern that appeared both inside the loop body and after
the loop in vmap_init_free_space().
- Extract show_busy_info() from vmalloc_info_show(), mirroring the
existing show_purge_info() pattern, so the top-level show function
only orchestrates the two data sources.
This patch (of 3):
Extract the busy vmap area iteration into show_busy_info, mirroring the
existing show_purge_info pattern.
Link: https://lore.kernel.org/20260914-vmalloc_study-v1-0-526f68559706@linux.dev
Link: https://lore.kernel.org/20260914-vmalloc_study-v1-3-526f68559706@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
mm/vmalloc.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
--- a/mm/vmalloc.c~mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show
+++ a/mm/vmalloc.c
@@ -5345,12 +5345,12 @@ static void show_purge_info(struct seq_f
}
}
-static int vmalloc_info_show(struct seq_file *m, void *p)
+static void show_busy_info(struct seq_file *m)
{
struct vmap_node *vn;
struct vmap_area *va;
struct vm_struct *v;
- unsigned int *counters;
+ unsigned int *counters = NULL;
if (IS_ENABLED(CONFIG_NUMA))
counters = kmalloc_array(nr_node_ids, sizeof(unsigned int), GFP_KERNEL);
@@ -5415,12 +5415,18 @@ static int vmalloc_info_show(struct seq_
spin_unlock(&vn->busy.lock);
}
+ if (IS_ENABLED(CONFIG_NUMA))
+ kfree(counters);
+}
+
+static int vmalloc_info_show(struct seq_file *m, void *p)
+{
+ show_busy_info(m);
+
/*
* As a final step, dump "unpurged" areas.
*/
show_purge_info(m);
- if (IS_ENABLED(CONFIG_NUMA))
- kfree(counters);
return 0;
}
_
Patches currently in -mm which might be from liuye@kylinos.cn are
mm-vmalloc-fix-vmap_purge_lock-livelock-under-memory-pressure.patch
tools-mm-page_owner_sort-fix-sort-option-being-silently-ignored.patch
tools-mm-page_owner_sort-add-module-name-sort-cull-filter-support.patch
tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch
mm-oom_kill-remove-unreachable-__gfp_thisnode-check-in-constrained_alloc.patch
mm-oom_kill-proc-replace-magic-number-1000-with-oom_score_adj_max.patch
mm-page_table_check-add-explicit-pmd_none-check-in-pte_clear_range.patch
mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch
mm-vmalloc-group-xa_init-with-vbq-field-initializations.patch
mm-vmalloc-extract-vmap_insert_free_area-helper.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
* + mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch added to mm-new branch
@ 2026-09-15 6:21 Andrew Morton
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Morton @ 2026-09-15 6:21 UTC (permalink / raw)
To: mm-commits, urezki, liuye, akpm
The patch titled
Subject: mm/vmalloc: extract show_busy_info from vmalloc_info_show
has been added to the -mm mm-new branch. Its filename is
mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch
This patch will later appear in the mm-new branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews. Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.
The mm-new branch of mm.git is not included in linux-next
If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days
------------------------------------------------------
From: Ye Liu <liuye@kylinos.cn>
Subject: mm/vmalloc: extract show_busy_info from vmalloc_info_show
Date: Tue, 15 Sep 2026 10:43:32 +0800
Extract the busy vmap area iteration into show_busy_info, mirroring
the existing show_purge_info pattern.
Link: https://lore.kernel.org/20260915-vmalloc_study-v2-3-cc4dfe635e22@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
mm/vmalloc.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- a/mm/vmalloc.c~mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show
+++ a/mm/vmalloc.c
@@ -5345,7 +5345,7 @@ static void show_purge_info(struct seq_f
}
}
-static int vmalloc_info_show(struct seq_file *m, void *p)
+static void show_busy_info(struct seq_file *m)
{
struct vmap_node *vn;
struct vmap_area *va;
@@ -5415,12 +5415,18 @@ static int vmalloc_info_show(struct seq_
spin_unlock(&vn->busy.lock);
}
+ if (IS_ENABLED(CONFIG_NUMA))
+ kfree(counters);
+}
+
+static int vmalloc_info_show(struct seq_file *m, void *p)
+{
+ show_busy_info(m);
+
/*
* As a final step, dump "unpurged" areas.
*/
show_purge_info(m);
- if (IS_ENABLED(CONFIG_NUMA))
- kfree(counters);
return 0;
}
_
Patches currently in -mm which might be from liuye@kylinos.cn are
mm-vmalloc-fix-vmap_purge_lock-livelock-under-memory-pressure.patch
tools-mm-page_owner_sort-fix-sort-option-being-silently-ignored.patch
tools-mm-page_owner_sort-add-module-name-sort-cull-filter-support.patch
tools-mm-page_owner_sort-show-available-sort-keys-in-usage-text.patch
mm-oom_kill-remove-unreachable-__gfp_thisnode-check-in-constrained_alloc.patch
mm-oom_kill-proc-replace-magic-number-1000-with-oom_score_adj_max.patch
mm-page_table_check-add-explicit-pmd_none-check-in-pte_clear_range.patch
mm-vmalloc-group-xa_init-with-vbq-field-initializations.patch
mm-vmalloc-extract-vmap_insert_free_area-helper.patch
mm-vmalloc-extract-show_busy_info-from-vmalloc_info_show.patch
^ permalink raw reply [flat|nested] 2+ messages in thread
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