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Introduce a tunable to disable the time consuming parts of bootup

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memtesting, which can easily save seconds to minutes of boot time.
The tunable name is kept general to allow reusing the code in
alternate frameworks.

Requested by:	many
Discussed on:	arch (a while a go)
Obtained from:	Sandvine Incorporated
Reviewed by:	sbruno
Approved by:	re (kib)
MFC after:	2 weeks
This commit is contained in:
bz 2011-07-30 13:33:05 +00:00
parent 0a42bdeef7
commit 632886e187
3 changed files with 36 additions and 3 deletions
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13
sys/amd64/amd64/machdep.c
View File

@ -1309,7 +1309,7 @@ getmemsize(caddr_t kmdp, u_int64_t first)
{
int i, physmap_idx, pa_indx, da_indx;
vm_paddr_t pa, physmap[PHYSMAP_SIZE];
u_long physmem_tunable;
u_long physmem_tunable, memtest, tmpul;
pt_entry_t *pte;
struct bios_smap *smapbase, *smap, *smapend;
u_int32_t smapsize;
@ -1371,6 +1371,14 @@ getmemsize(caddr_t kmdp, u_int64_t first)
if (TUNABLE_ULONG_FETCH("hw.physmem", &physmem_tunable))
Maxmem = atop(physmem_tunable);
/*
* By default keep the memtest enabled. Use a general name so that
* one could eventually do more with the code than just disable it.
*/
memtest = 1;
if (TUNABLE_ULONG_FETCH("hw.memtest.tests", &tmpul))
memtest = tmpul;
/*
* Don't allow MAXMEM or hw.physmem to extend the amount of memory
* in the system.
@ -1433,6 +1441,8 @@ getmemsize(caddr_t kmdp, u_int64_t first)
goto do_dump_avail;
page_bad = FALSE;
if (memtest == 0)
goto skip_memtest;
/*
* map page into kernel: valid, read/write,non-cacheable
@ -1470,6 +1480,7 @@ getmemsize(caddr_t kmdp, u_int64_t first)
*/
*(int *)ptr = tmp;
skip_memtest:
/*
* Adjust array of valid/good pages.
*/

13
sys/i386/i386/machdep.c
View File

@ -2132,7 +2132,7 @@ static void
getmemsize(int first)
{
int has_smap, off, physmap_idx, pa_indx, da_indx;
u_long physmem_tunable;
u_long physmem_tunable, memtest, tmpul;
vm_paddr_t physmap[PHYSMAP_SIZE];
pt_entry_t *pte;
quad_t dcons_addr, dcons_size;
@ -2339,6 +2339,14 @@ getmemsize(int first)
if (has_smap && Maxmem > atop(physmap[physmap_idx + 1]))
Maxmem = atop(physmap[physmap_idx + 1]);
/*
* By default keep the memtest enabled. Use a general name so that
* one could eventually do more with the code than just disable it.
*/
memtest = 1;
if (TUNABLE_ULONG_FETCH("hw.memtest.tests", &tmpul))
memtest = tmpul;
if (atop(physmap[physmap_idx + 1]) != Maxmem &&
(boothowto & RB_VERBOSE))
printf("Physical memory use set to %ldK\n", Maxmem * 4);
@ -2402,6 +2410,8 @@ getmemsize(int first)
goto do_dump_avail;
page_bad = FALSE;
if (memtest == 0)
goto skip_memtest;
/*
* map page into kernel: valid, read/write,non-cacheable
@ -2439,6 +2449,7 @@ getmemsize(int first)
*/
*(int *)ptr = tmp;
skip_memtest:
/*
* Adjust array of valid/good pages.
*/

13
sys/pc98/pc98/machdep.c
View File

@ -1855,7 +1855,7 @@ static void
getmemsize(int first)
{
int off, physmap_idx, pa_indx, da_indx;
u_long physmem_tunable;
u_long physmem_tunable, memtest, tmpul;
vm_paddr_t physmap[PHYSMAP_SIZE];
pt_entry_t *pte;
quad_t dcons_addr, dcons_size;
@ -1915,6 +1915,14 @@ getmemsize(int first)
if (TUNABLE_ULONG_FETCH("hw.physmem", &physmem_tunable))
Maxmem = atop(physmem_tunable);
/*
* By default keep the memtest enabled. Use a general name so that
* one could eventually do more with the code than just disable it.
*/
memtest = 1;
if (TUNABLE_ULONG_FETCH("hw.memtest.tests", &tmpul))
memtest = tmpul;
if (atop(physmap[physmap_idx + 1]) != Maxmem &&
(boothowto & RB_VERBOSE))
printf("Physical memory use set to %ldK\n", Maxmem * 4);
@ -1991,6 +1999,8 @@ getmemsize(int first)
goto do_dump_avail;
page_bad = FALSE;
if (memtest == 0)
goto skip_memtest;
/*
* map page into kernel: valid, read/write,non-cacheable
@ -2028,6 +2038,7 @@ getmemsize(int first)
*/
*(int *)ptr = tmp;
skip_memtest:
/*
* Adjust array of valid/good pages.
*/