Commit 9710f581 authored by Yinghai Lu's avatar Yinghai Lu Committed by H. Peter Anvin
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x86, mm: Let "memmap=" take more entries one time

Current "memmap=" only can take one entry every time.
when we have more entries, we have to use memmap= for each of them.

For pxe booting, we have command line length limitation, those extra
"memmap=" would waste too much space.

This patch make memmap= could take several entries one time,
and those entries will be split with ','
Signed-off-by: default avatarYinghai Lu <>

Signed-off-by: default avatarH. Peter Anvin <>
parent 600cc5b7
......@@ -835,7 +835,7 @@ static int __init parse_memopt(char *p)
early_param("mem", parse_memopt);
static int __init parse_memmap_opt(char *p)
static int __init parse_memmap_one(char *p)
char *oldp;
u64 start_at, mem_size;
......@@ -877,6 +877,20 @@ static int __init parse_memmap_opt(char *p)
return *p == '\0' ? 0 : -EINVAL;
static int __init parse_memmap_opt(char *str)
while (str) {
char *k = strchr(str, ',');
if (k)
*k++ = 0;
str = k;
return 0;
early_param("memmap", parse_memmap_opt);
void __init finish_e820_parsing(void)
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