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Date: Wed, 22 Sep 2010 13:11:19 -0600
From: Bjorn Helgaas <bjorn.helgaas@...com>
To: "H. Peter Anvin" <hpa@...or.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
Yinghai Lu <yinghai@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: tidy e820 output
On Wednesday, September 22, 2010 12:58:36 pm H. Peter Anvin wrote:
> On 09/22/2010 11:53 AM, Bjorn Helgaas wrote:
> >
> > It's true, they don't (well, everything below 4G still lines up, but
> > not above that). Do you like this any better?
> >
>
> That's fine with me. I don't mind the [mem ] bracket either if you
> think it's useful.
I took out "[mem" because it made the "(reserved)" lines wider than
80 columns. But maybe I should just remove the parens around the
E820 type instead, like this:
commit d2338b08303439b23d4909eab3744b3f29f09874
Author: Bjorn Helgaas <bjorn.helgaas@...com>
Date: Tue Sep 21 12:32:34 2010 -0600
x86: tidy e820 output
This tidies e820 output by adding an "e820" prefix and printing ranges
similarly to the way we print struct resource with %pR, e.g.:
- BIOS-e820: 0000000000000000 - 000000000009f400 (usable)
+ BIOS-e820: [mem 0x0000000000000000-0x000000000009f3ff] usable
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@...com>
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 0d6fc71..2bd464f 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -108,7 +108,9 @@ static void __init __e820_add_region(struct e820map *e820x, u64 start, u64 size,
int x = e820x->nr_map;
if (x >= ARRAY_SIZE(e820x->map)) {
- printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
+ printk(KERN_ERR "e820: too many entries; ignoring [mem %#010llx-%#010llx]\n",
+ (unsigned long long) start,
+ (unsigned long long) (start + size - 1));
return;
}
@@ -123,29 +125,22 @@ void __init e820_add_region(u64 start, u64 size, int type)
__e820_add_region(&e820, start, size, type);
}
-static void __init e820_print_type(u32 type)
+static char * __init e820_type_name(u32 type)
{
switch (type) {
case E820_RAM:
case E820_RESERVED_KERN:
- printk(KERN_CONT "(usable)");
- break;
+ return "usable";
case E820_RESERVED:
- printk(KERN_CONT "(reserved)");
- break;
+ return "reserved";
case E820_ACPI:
- printk(KERN_CONT "(ACPI data)");
- break;
+ return "ACPI data";
case E820_NVS:
- printk(KERN_CONT "(ACPI NVS)");
- break;
+ return "ACPI NVS";
case E820_UNUSABLE:
- printk(KERN_CONT "(unusable)");
- break;
- default:
- printk(KERN_CONT "type %u", type);
- break;
+ return "unusable";
}
+ return "(unknown)";
}
void __init e820_print_map(char *who)
@@ -153,12 +148,11 @@ void __init e820_print_map(char *who)
int i;
for (i = 0; i < e820.nr_map; i++) {
- printk(KERN_INFO " %s: %016Lx - %016Lx ", who,
+ printk(KERN_INFO " %s: [mem %#018Lx-%#018Lx] %s\n", who,
(unsigned long long) e820.map[i].addr,
(unsigned long long)
- (e820.map[i].addr + e820.map[i].size));
- e820_print_type(e820.map[i].type);
- printk(KERN_CONT "\n");
+ (e820.map[i].addr + e820.map[i].size - 1),
+ e820_type_name(e820.map[i].type));
}
}
@@ -435,13 +429,9 @@ static u64 __init __e820_update_range(struct e820map *e820x, u64 start,
size = ULLONG_MAX - start;
end = start + size;
- printk(KERN_DEBUG "e820 update range: %016Lx - %016Lx ",
- (unsigned long long) start,
- (unsigned long long) end);
- e820_print_type(old_type);
- printk(KERN_CONT " ==> ");
- e820_print_type(new_type);
- printk(KERN_CONT "\n");
+ printk(KERN_DEBUG "e820: update [mem %#010Lx-%#010Lx] %s ==> %s\n",
+ (unsigned long long) start, (unsigned long long) end - 1,
+ e820_type_name(old_type), e820_type_name(new_type));
for (i = 0; i < e820x->nr_map; i++) {
struct e820entry *ei = &e820x->map[i];
@@ -511,17 +501,16 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
int i;
u64 end;
u64 real_removed_size = 0;
+ char *type = "";
if (size > (ULLONG_MAX - start))
size = ULLONG_MAX - start;
end = start + size;
- printk(KERN_DEBUG "e820 remove range: %016Lx - %016Lx ",
- (unsigned long long) start,
- (unsigned long long) end);
if (checktype)
- e820_print_type(old_type);
- printk(KERN_CONT "\n");
+ type = e820_type_name(old_type);
+ printk(KERN_DEBUG "e820: remove [mem %#010Lx-%#010Lx] %s\n",
+ (unsigned long long) start, (unsigned long long) end - 1, type);
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
@@ -574,7 +563,7 @@ void __init update_e820(void)
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr_map))
return;
e820.nr_map = nr_map;
- printk(KERN_INFO "modified physical RAM map:\n");
+ printk(KERN_INFO "e820: modified physical RAM map:\n");
e820_print_map("modified");
}
static void __init update_e820_saved(void)
@@ -655,8 +644,8 @@ __init void e820_setup_gap(void)
pci_mem_start = gapstart;
printk(KERN_INFO
- "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n",
- pci_mem_start, gapstart, gapsize);
+ "e820: [mem %#010lx-%#010lx] available for PCI devices\n",
+ gapstart, gapstart + gapsize - 1);
}
/**
@@ -680,7 +669,7 @@ void __init parse_e820_ext(struct setup_data *sdata, unsigned long pa_data)
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
if (map_len > PAGE_SIZE)
early_iounmap(sdata, map_len);
- printk(KERN_INFO "extended physical RAM map:\n");
+ printk(KERN_INFO "e820: extended physical RAM map:\n");
e820_print_map("extended");
}
@@ -882,7 +871,7 @@ static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
if (last_pfn > max_arch_pfn)
last_pfn = max_arch_pfn;
- printk(KERN_INFO "last_pfn = %#lx max_arch_pfn = %#lx\n",
+ printk(KERN_INFO "e820: last_pfn = %#lx max_arch_pfn = %#lx\n",
last_pfn, max_arch_pfn);
return last_pfn;
}
@@ -1048,7 +1037,7 @@ void __init finish_e820_parsing(void)
early_panic("Invalid user supplied memory map");
e820.nr_map = nr;
- printk(KERN_INFO "user-defined physical RAM map:\n");
+ printk(KERN_INFO "e820: user-defined physical RAM map:\n");
e820_print_map("user");
}
}
@@ -1156,8 +1145,9 @@ void __init e820_reserve_resources_late(void)
end = MAX_RESOURCE_SIZE;
if (start >= end)
continue;
- printk(KERN_DEBUG "reserve RAM buffer: %016llx - %016llx ",
- start, end);
+ printk(KERN_DEBUG
+ "e820: reserve RAM buffer [mem %#010llx-%#010llx]\n",
+ start, end);
reserve_region_with_split(&iomem_resource, start, end,
"RAM buffer");
}
--
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