[to-be-updated] mm-vmalloc-explicitly-identify-vm_map_ram-area-when-shown-in-proc-vmcoreinfo.patch removed from -mm tree

[to-be-updated] mm-vmalloc-explicitly-identify-vm_map_ram-area-when-shown-in-proc-vmcoreinfo.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/vmalloc: explicitly identify vm_map_ram area when shown in /proc/vmcoreinfo
has been removed from the -mm tree.  Its filename was
     mm-vmalloc-explicitly-identify-vm_map_ram-area-when-shown-in-proc-vmcoreinfo.patch

This patch was dropped because an updated version will be merged

------------------------------------------------------
From: Baoquan He <bhe@redhat.com>
Subject: mm/vmalloc: explicitly identify vm_map_ram area when shown in /proc/vmcoreinfo
Date: Fri, 13 Jan 2023 11:19:18 +0800

Now, by marking VMAP_RAM in vmap_area->flags for vm_map_ram, 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/20230113031921.64716-5-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Lorenzo Stoakes <lstoakes@gmail.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/mm/vmalloc.c~mm-vmalloc-explicitly-identify-vm_map_ram-area-when-shown-in-proc-vmcoreinfo
+++ a/mm/vmalloc.c
@@ -4225,11 +4225,7 @@ static int s_show(struct seq_file *m, vo
 
 	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) {
+	if (!va->vm && (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);
_

Patches currently in -mm which might be from bhe@redhat.com are

mm-vmalloc-skip-the-uninitilized-vmalloc-areas.patch
powerpc-mm-add-vm_ioremap-flag-to-the-vmalloc-area.patch
sh-mm-set-vm_ioremap-flag-to-the-vmalloc-area.patch