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Code Issues Releases Activity

U areas are going away, so don't allocate them. It's worrisome that

Browse Source 
mp_machdep.c was using UAREA_PAGES to allocate something that isn't a
U area, and that there seems to be an implicit assumption that the PCB
is just past the end of the kernel stack.

Reviewed by:	arch@
This commit is contained in:
David Schultz 2004-11-20 02:29:36 +00:00
parent 11111b709f
commit 449835405d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=137913
2 changed files with 2 additions and 6 deletions
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6
sys/alpha/alpha/machdep.c
View File

@ -160,7 +160,6 @@ struct bootinfo_kernel bootinfo;
struct mtx icu_lock;
struct user *proc0uarea;
vm_offset_t proc0kstack;
char machine[] = "alpha";
@ -848,11 +847,9 @@ alpha_init(pfn, ptb, bim, bip, biv)
proc_linkup(&proc0, &ksegrp0, &thread0);
/*
* Init mapping for u page(s) for proc 0
* Init mapping for kernel stack for proc 0
*/
proc0uarea = (struct user *)pmap_steal_memory(UAREA_PAGES * PAGE_SIZE);
proc0kstack = pmap_steal_memory(KSTACK_PAGES * PAGE_SIZE);
proc0.p_uarea = proc0uarea;
thread0.td_kstack = proc0kstack;
thread0.td_pcb = (struct pcb *)
(thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
@ -861,7 +858,6 @@ alpha_init(pfn, ptb, bim, bip, biv)
* Setup the per-CPU data for the bootstrap cpu.
*/
{
/* This is not a 'struct user' */
size_t sz = round_page(KSTACK_PAGES * PAGE_SIZE);
pcpup = (struct pcpu *) pmap_steal_memory(sz);
pcpu_init(pcpup, 0, sz);

2
sys/alpha/alpha/mp_machdep.c
View File

@ -233,7 +233,7 @@ smp_start_secondary(int pal_id, int cpuid)
if (bootverbose)
printf("smp_start_secondary: starting cpu %d\n", pal_id);
sz = round_page((UAREA_PAGES + KSTACK_PAGES) * PAGE_SIZE);
sz = KSTACK_PAGES * PAGE_SIZE;
pcpu = malloc(sz, M_TEMP, M_NOWAIT);
if (!pcpu) {
printf("smp_start_secondary: can't allocate memory\n");