lkml.org 
[lkml]   [2015]   [Sep]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ARM: fix bug which VMALLOC_START is lowwer than 0xf0000000
Date
default value of vmalloc_min was set 0xf0000000 for ARM by commit
0536bdf3. But actually vmalloc_min is 0xef800000 not 0xf0000000.

VMALLOC_END - (240 << 20) - VMALLOC_OFFSET)
0xff000000 - 0x0f000000 - 0x00800000 = 0xef800000

In case of 768MB ram without CONFIG_HIGHMEM=y, last 8MB could not be
allocated. Kernel log also print out warning message as below.
"Truncating RAM at 80000000-afffffff to -af7fffff (vmalloc region overlap)."

Although it could be solved by state "vmalloc=size" in cmdline but i think
it would be better to change default value to 232 from 240.

Signed-off-by: Yongtaek Lee <ytk.lee@samsung.com>

---
arch/arm/mm/mmu.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 8348ed6..9a1bab4 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -1040,12 +1040,12 @@ void __init debug_ll_io_init(void)
#endif

static void * __initdata vmalloc_min =
- (void *)(VMALLOC_END - (240 << 20) - VMALLOC_OFFSET);
+ (void *)(VMALLOC_END - (232 << 20) - VMALLOC_OFFSET);

/*
* vmalloc=size forces the vmalloc area to be exactly 'size'
* bytes. This can be used to increase (or decrease) the vmalloc
- * area - the default is 240m.
+ * area - the default is 232m.
*/
static int __init early_vmalloc(char *arg)
{
--
1.7.9


\
 
 \ /
  Last update: 2015-09-03 04:41    [W:0.283 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site