From: Joonsoo Kim <js1304@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Takashi Iwai <tiwai@suse.com>,
Chris Metcalf <cmetcalf@ezchip.com>,
Christoph Lameter <cl@linux.com>,
linux-api@vger.kernel.org, Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: [PATCH 5/5] tile: query dynamic DEBUG_PAGEALLOC setting
Date: Thu, 4 Feb 2016 14:56:26 +0900 [thread overview]
Message-ID: <1454565386-10489-6-git-send-email-iamjoonsoo.kim@lge.com> (raw)
In-Reply-To: <1454565386-10489-1-git-send-email-iamjoonsoo.kim@lge.com>
We can disable debug_pagealloc processing even if the code is complied
with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query
whether it is enabled or not in runtime.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
arch/tile/mm/init.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
index d4e1fc4..a0582b7 100644
--- a/arch/tile/mm/init.c
+++ b/arch/tile/mm/init.c
@@ -896,17 +896,15 @@ void __init pgtable_cache_init(void)
panic("pgtable_cache_init(): Cannot create pgd cache");
}
-#ifdef CONFIG_DEBUG_PAGEALLOC
-static long __write_once initfree;
-#else
static long __write_once initfree = 1;
-#endif
+static bool __write_once set_initfree_done;
/* Select whether to free (1) or mark unusable (0) the __init pages. */
static int __init set_initfree(char *str)
{
long val;
if (kstrtol(str, 0, &val) == 0) {
+ set_initfree_done = true;
initfree = val;
pr_info("initfree: %s free init pages\n",
initfree ? "will" : "won't");
@@ -919,6 +917,11 @@ static void free_init_pages(char *what, unsigned long begin, unsigned long end)
{
unsigned long addr = (unsigned long) begin;
+ /* Prefer user request first */
+ if (!set_initfree_done) {
+ if (debug_pagealloc_enabled())
+ initfree = 0;
+ }
if (kdata_huge && !initfree) {
pr_warn("Warning: ignoring initfree=0: incompatible with kdata=huge\n");
initfree = 1;
--
1.9.1
next prev parent reply other threads:[~2016-02-04 5:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-04 5:56 [PATCH 0/5] follow-up "Optimize CONFIG_DEBUG_PAGEALLOC" Joonsoo Kim
2016-02-04 5:56 ` [PATCH 1/5] mm/vmalloc: query dynamic DEBUG_PAGEALLOC setting Joonsoo Kim
2016-02-04 8:32 ` Christian Borntraeger
2016-02-04 22:18 ` David Rientjes
2016-02-05 16:13 ` Joonsoo Kim
2016-02-04 5:56 ` [PATCH 2/5] mm/slub: " Joonsoo Kim
2016-02-04 8:31 ` Christian Borntraeger
2016-02-04 16:21 ` Joonsoo Kim
2016-02-04 5:56 ` [PATCH 3/5] sound: " Joonsoo Kim
2016-02-04 22:19 ` David Rientjes
2016-02-05 9:26 ` Takashi Iwai
2016-02-04 5:56 ` [PATCH 4/5] powerpc: " Joonsoo Kim
2016-02-04 22:22 ` David Rientjes
2016-02-04 5:56 ` Joonsoo Kim [this message]
2016-02-09 16:56 ` [PATCH 5/5] tile: " Chris Metcalf
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