sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Remove unnecessary TLB flushes

Browse source 
- this should be only for SMP
This commit is contained in:
Tomas Hruby 2010-09-22 08:01:36 +00:00
parent df9928711b
commit 2d1c8849d8
2 changed files with 3 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
kernel/arch/i386/klib.S
View file

@ -803,7 +803,7 @@ ENTRY(__switch_address_space)
* test if the cr3 is loaded with the current value to avoid unnecessary * test if the cr3 is loaded with the current value to avoid unnecessary
* TLB flushes * TLB flushes
*/ */
#if 0 #ifndef CONFIG_SMP
mov %cr3, %ecx mov %cr3, %ecx
cmp %ecx, %eax cmp %ecx, %eax
je 0f je 0f

2
kernel/proc.c
View file

@ -374,7 +374,9 @@ check_misc_flags:
p->p_misc_flags &= ~MF_CONTEXT_SET; p->p_misc_flags &= ~MF_CONTEXT_SET;
assert(!(p->p_misc_flags & MF_FULLVM) || p->p_seg.p_cr3 != 0); assert(!(p->p_misc_flags & MF_FULLVM) || p->p_seg.p_cr3 != 0);
#ifdef CONFIG_SMP
refresh_tlb(); refresh_tlb();
#endif
/* /*
* restore_user_context() carries out the actual mode switch from kernel * restore_user_context() carries out the actual mode switch from kernel
* to userspace. This function does not return * to userspace. This function does not return