The patch titled
Subject: mm: vmalloc: support multiple nodes in vmallocinfo
has been added to the -mm mm-unstable branch. Its filename is
mm-vmalloc-support-multiple-nodes-in-vmallocinfo.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-support-multiple-nodes-in-vmallocinfo.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: mm: vmalloc: support multiple nodes in vmallocinfo
Date: Tue, 29 Aug 2023 10:11:41 +0200
Allocated areas are spread among nodes, it implies that the scanning has
to be performed individually of each node in order to dump all existing
VAs.
Link: https://lkml.kernel.org/r/20230829081142.3619-9-urezki@xxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 120 +++++++++++++++++++------------------------------
1 file changed, 47 insertions(+), 73 deletions(-)
--- a/mm/vmalloc.c~mm-vmalloc-support-multiple-nodes-in-vmallocinfo
+++ a/mm/vmalloc.c
@@ -4658,30 +4658,6 @@ bool vmalloc_dump_obj(void *object)
#endif
#ifdef CONFIG_PROC_FS
-static void *s_start(struct seq_file *m, loff_t *pos)
-{
- struct vmap_node *vn = addr_to_node(0);
-
- mutex_lock(&vmap_purge_lock);
- spin_lock(&vn->busy.lock);
-
- return seq_list_start(&vn->busy.head, *pos);
-}
-
-static void *s_next(struct seq_file *m, void *p, loff_t *pos)
-{
- struct vmap_node *vn = addr_to_node(0);
- return seq_list_next(p, &vn->busy.head, pos);
-}
-
-static void s_stop(struct seq_file *m, void *p)
-{
- struct vmap_node *vn = addr_to_node(0);
-
- spin_unlock(&vn->busy.lock);
- mutex_unlock(&vmap_purge_lock);
-}
-
static void show_numa_info(struct seq_file *m, struct vm_struct *v)
{
if (IS_ENABLED(CONFIG_NUMA)) {
@@ -4725,84 +4701,82 @@ static void show_purge_info(struct seq_f
}
}
-static int s_show(struct seq_file *m, void *p)
+static int vmalloc_info_show(struct seq_file *m, void *p)
{
struct vmap_node *vn;
struct vmap_area *va;
struct vm_struct *v;
+ int i;
- vn = addr_to_node(0);
- va = list_entry(p, struct vmap_area, list);
+ for (i = 0; i < nr_nodes; i++) {
+ vn = &nodes[i];
- if (!va->vm) {
- if (va->flags & VMAP_RAM)
- seq_printf(m, "0x%pK-0x%pK %7ld vm_map_ram\n",
- (void *)va->va_start, (void *)va->va_end,
- va->va_end - va->va_start);
+ spin_lock(&vn->busy.lock);
+ list_for_each_entry(va, &vn->busy.head, list) {
+ if (!va->vm) {
+ if (va->flags & VMAP_RAM)
+ seq_printf(m, "0x%pK-0x%pK %7ld vm_map_ram\n",
+ (void *)va->va_start, (void *)va->va_end,
+ va->va_end - va->va_start);
- goto final;
- }
+ continue;
+ }
- v = va->vm;
+ v = va->vm;
- seq_printf(m, "0x%pK-0x%pK %7ld",
- v->addr, v->addr + v->size, v->size);
+ seq_printf(m, "0x%pK-0x%pK %7ld",
+ v->addr, v->addr + v->size, v->size);
- if (v->caller)
- seq_printf(m, " %pS", v->caller);
+ if (v->caller)
+ seq_printf(m, " %pS", v->caller);
- if (v->nr_pages)
- seq_printf(m, " pages=%d", v->nr_pages);
+ if (v->nr_pages)
+ seq_printf(m, " pages=%d", v->nr_pages);
- if (v->phys_addr)
- seq_printf(m, " phys=%pa", &v->phys_addr);
+ if (v->phys_addr)
+ seq_printf(m, " phys=%pa", &v->phys_addr);
- if (v->flags & VM_IOREMAP)
- seq_puts(m, " ioremap");
+ if (v->flags & VM_IOREMAP)
+ seq_puts(m, " ioremap");
- if (v->flags & VM_ALLOC)
- seq_puts(m, " vmalloc");
+ if (v->flags & VM_ALLOC)
+ seq_puts(m, " vmalloc");
- if (v->flags & VM_MAP)
- seq_puts(m, " vmap");
+ if (v->flags & VM_MAP)
+ seq_puts(m, " vmap");
- if (v->flags & VM_USERMAP)
- seq_puts(m, " user");
+ if (v->flags & VM_USERMAP)
+ seq_puts(m, " user");
- if (v->flags & VM_DMA_COHERENT)
- seq_puts(m, " dma-coherent");
+ if (v->flags & VM_DMA_COHERENT)
+ seq_puts(m, " dma-coherent");
- if (is_vmalloc_addr(v->pages))
- seq_puts(m, " vpages");
+ if (is_vmalloc_addr(v->pages))
+ seq_puts(m, " vpages");
- show_numa_info(m, v);
- seq_putc(m, '\n');
+ show_numa_info(m, v);
+ seq_putc(m, '\n');
+ }
+ spin_unlock(&vn->busy.lock);
+ }
/*
* As a final step, dump "unpurged" areas.
*/
-final:
- if (list_is_last(&va->list, &vn->busy.head))
- show_purge_info(m);
-
+ show_purge_info(m);
return 0;
}
-static const struct seq_operations vmalloc_op = {
- .start = s_start,
- .next = s_next,
- .stop = s_stop,
- .show = s_show,
-};
-
static int __init proc_vmalloc_init(void)
{
+ void *priv_data = NULL;
+
if (IS_ENABLED(CONFIG_NUMA))
- proc_create_seq_private("vmallocinfo", 0400, NULL,
- &vmalloc_op,
- nr_node_ids * sizeof(unsigned int), NULL);
- else
- proc_create_seq("vmallocinfo", 0400, NULL, &vmalloc_op);
+ priv_data = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL);
+
+ proc_create_single_data("vmallocinfo",
+ 0400, NULL, vmalloc_info_show, priv_data);
+
return 0;
}
module_init(proc_vmalloc_init);
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-vmalloc-add-va_alloc-helper.patch
mm-vmalloc-rename-adjust_va_to_fit_type-function.patch
mm-vmalloc-move-vmap_init_free_space-down-in-vmallocc.patch
mm-vmalloc-remove-global-vmap_area_root-rb-tree.patch
mm-vmalloc-remove-global-vmap_area_root-rb-tree-fix.patch
mm-vmalloc-remove-global-purge_vmap_area_root-rb-tree.patch
mm-vmalloc-offload-free_vmap_area_lock-lock.patch
mm-vmalloc-support-multiple-nodes-in-vread_iter.patch
mm-vmalloc-support-multiple-nodes-in-vmallocinfo.patch
mm-vmalloc-set-nr_nodes-node_size-based-on-cpu-cores.patch
