diff options
| author | Baoquan He <bhe@redhat.com> | 2023-02-06 09:40:17 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-10 01:51:43 +0100 |
| commit | bba9697b42ead45687352fdd0fd498735bc4361d (patch) | |
| tree | 72c0bcb4e2cd3474ff06ab89cfb05dcb23b6a821 /mm | |
| parent | mm/vmalloc.c: allow vread() to read out vm_map_ram areas (diff) | |
| download | linux-bba9697b42ead45687352fdd0fd498735bc4361d.tar.xz linux-bba9697b42ead45687352fdd0fd498735bc4361d.zip | |
mm/vmalloc: explicitly identify vm_map_ram area when shown in /proc/vmcoreinfo
Now, by marking VMAP_RAM in vmap_area->flags for vm_map_ram area, we can
clearly differentiate it with other vmalloc areas. So identify
vm_map_area area by checking VMAP_RAM of vmap_area->flags when shown in
/proc/vmcoreinfo.
Meanwhile, the code comment above vm_map_ram area checking in s_show() is
not needed any more, remove it here.
Link: https://lkml.kernel.org/r/20230206084020.174506-5-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmalloc.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 7188a47315c2..87d71c783646 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -4152,14 +4152,11 @@ static int s_show(struct seq_file *m, void *p) va = list_entry(p, struct vmap_area, list); - /* - * s_show can encounter race with remove_vm_area, !vm on behalf - * of vmap area is being tear down or vm_map_ram allocation. - */ if (!va->vm) { - 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); + 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; } |