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Date: Fri, 18 Dec 2015 10:03:18 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Vlastimil Babka <vbabka@...e.cz>,
Steven Rostedt <rostedt@...dmis.org>,
Peter Zijlstra <peterz@...radead.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Ingo Molnar <mingo@...hat.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Joonsoo Kim <iamjoonsoo.kim@....com>,
Minchan Kim <minchan@...nel.org>,
Sasha Levin <sasha.levin@...cle.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...e.cz>
Subject: [PATCH v3 06/14] mm, debug: replace dump_flags() with the new printk formats
With the new printk format strings for flags, we can get rid of dump_flags()
in mm/debug.c.
This also fixes dump_vma() which used dump_flags() for printing vma flags.
However dump_flags() did a page-flags specific filtering of bits higher than
NR_PAGEFLAGS in order to remove the zone id part. For dump_vma() this resulted
in removing several VM_* flags from the symbolic translation.
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
Cc: Minchan Kim <minchan@...nel.org>
Cc: Sasha Levin <sasha.levin@...cle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Michal Hocko <mhocko@...e.cz>
---
mm/debug.c | 60 ++++++++++++++----------------------------------------------
1 file changed, 14 insertions(+), 46 deletions(-)
diff --git a/mm/debug.c b/mm/debug.c
index 79621a5ce46f..5ea57bc49ef6 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -28,36 +28,6 @@ const struct trace_print_flags vmaflag_names[] = {
{0, NULL}
};
-static void dump_flags(unsigned long flags,
- const struct trace_print_flags *names, int count)
-{
- const char *delim = "";
- unsigned long mask;
- int i;
-
- pr_emerg("flags: %#lx(", flags);
-
- /* remove zone id */
- flags &= (1UL << NR_PAGEFLAGS) - 1;
-
- for (i = 0; i < count && flags; i++) {
-
- mask = names[i].mask;
- if ((flags & mask) != mask)
- continue;
-
- flags &= ~mask;
- pr_cont("%s%s", delim, names[i].name);
- delim = "|";
- }
-
- /* check for left over flags */
- if (flags)
- pr_cont("%s%#lx", delim, flags);
-
- pr_cont(")\n");
-}
-
void dump_page_badflags(struct page *page, const char *reason,
unsigned long badflags)
{
@@ -68,15 +38,15 @@ void dump_page_badflags(struct page *page, const char *reason,
pr_cont(" compound_mapcount: %d", compound_mapcount(page));
pr_cont("\n");
BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
- dump_flags(page->flags, pageflag_names,
- ARRAY_SIZE(pageflag_names) - 1);
+ pr_emerg("flags: %#lx(%pgp)\n", page->flags, &page->flags);
+
if (reason)
pr_alert("page dumped because: %s\n", reason);
- if (page->flags & badflags) {
- pr_alert("bad because of flags:\n");
- dump_flags(page->flags & badflags, pageflag_names,
- ARRAY_SIZE(pageflag_names) - 1);
- }
+
+ badflags &= page->flags;
+ if (badflags)
+ pr_alert("bad because of flags: %#lx(%pgp)\n", badflags,
+ &badflags);
#ifdef CONFIG_MEMCG
if (page->mem_cgroup)
pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup);
@@ -96,13 +66,14 @@ void dump_vma(const struct vm_area_struct *vma)
pr_emerg("vma %p start %p end %p\n"
"next %p prev %p mm %p\n"
"prot %lx anon_vma %p vm_ops %p\n"
- "pgoff %lx file %p private_data %p\n",
+ "pgoff %lx file %p private_data %p\n"
+ "flags: %#lx(%pgv)\n",
vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next,
vma->vm_prev, vma->vm_mm,
(unsigned long)pgprot_val(vma->vm_page_prot),
vma->anon_vma, vma->vm_ops, vma->vm_pgoff,
- vma->vm_file, vma->vm_private_data);
- dump_flags(vma->vm_flags, vmaflag_names, ARRAY_SIZE(vmaflag_names) - 1);
+ vma->vm_file, vma->vm_private_data,
+ vma->vm_flags, &vma->vm_flags);
}
EXPORT_SYMBOL(dump_vma);
@@ -136,7 +107,7 @@ void dump_mm(const struct mm_struct *mm)
#if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION)
"tlb_flush_pending %d\n"
#endif
- "%s", /* This is here to hold the comma */
+ "def_flags: %#lx(%pgv)\n",
mm, mm->mmap, mm->vmacache_seqnum, mm->task_size,
#ifdef CONFIG_MMU
@@ -170,11 +141,8 @@ void dump_mm(const struct mm_struct *mm)
#if defined(CONFIG_NUMA_BALANCING) || defined(CONFIG_COMPACTION)
mm->tlb_flush_pending,
#endif
- "" /* This is here to not have a comma! */
- );
-
- dump_flags(mm->def_flags, vmaflag_names,
- ARRAY_SIZE(vmaflag_names) - 1);
+ mm->def_flags, &mm->def_flags
+ );
}
#endif /* CONFIG_DEBUG_VM */
--
2.6.3
--
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