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mm: vmalloc: support multiple nodes in vmallocinfo 

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/20240102184633.748113-10-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: Kazuhito Hagio <k-hagio-ab@nec.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Uladzislau Rezki (Sony) 2024-01-02 19:46:31 +01:00 committed by Andrew Morton
parent 53becf32ae
commit 8e1d743f2c
1 changed files with 58 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

142
mm/vmalloc.c
View File

@ -4709,30 +4709,6 @@ 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)) {
@ -4776,84 +4752,82 @@ static void show_purge_info(struct seq_file *m)
}
}
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_vmap_nodes; i++) {
vn = &vmap_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;
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->nr_pages)
seq_printf(m, " pages=%d", v->nr_pages);
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_ALLOC)
seq_puts(m, " vmalloc");
if (v->flags & VM_MAP)
seq_puts(m, " vmap");
if (v->flags & VM_USERMAP)
seq_puts(m, " user");
if (v->flags & VM_DMA_COHERENT)
seq_puts(m, " dma-coherent");
if (is_vmalloc_addr(v->pages))
seq_puts(m, " vpages");
show_numa_info(m, v);
seq_putc(m, '\n');
}
spin_unlock(&vn->busy.lock);
}
v = va->vm;
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->nr_pages)
seq_printf(m, " pages=%d", v->nr_pages);
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_ALLOC)
seq_puts(m, " vmalloc");
if (v->flags & VM_MAP)
seq_puts(m, " vmap");
if (v->flags & VM_USERMAP)
seq_puts(m, " user");
if (v->flags & VM_DMA_COHERENT)
seq_puts(m, " dma-coherent");
if (is_vmalloc_addr(v->pages))
seq_puts(m, " vpages");
show_numa_info(m, v);
seq_putc(m, '\n');
/*
* 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);