flush_tlb_all和flush_cache_all刷出整个TLB/高速缓存。此操作只在操纵内核页表时需要,因为 TLB cache 原理 确认是否命中cache,如果cachehit直接可以得到物理地址。否则,一级一级查找页表获取物理地址。并将虚拟地址和物理地址的映射关系缓存到TLB中。TLB的特殊 虚拟地址映射物理地址的最小单位是4KB。所以TLB其实不...
可以理解为 flush_tlb_all 的轻量版,不针对所有 CPU,只针对当前调用的 CPU,所以 __tlbi(vmalle1) 指令中比 vmalle1is 少了一个「inner-share」。 flush_tlb_mm 代码语言:javascript 代码运行次数:0 运行 AI代码解释 staticinlinevoidflush_tlb_mm(struct mm_struct*mm){unsigned long asid;dsb(ishst);asi...
__flush_tlb(); }/*flush指定vma中的虚拟地址对应的TLB项*/staticinlinevoidflush_tlb_page(structvm_area_struct *vma, unsignedlongaddr) {if(vma->vm_mm == current->active_mm) __flush_tlb_one(addr); }/** flush指定虚拟地址范围对应的TLB项,目前未实现,等价于__flush_tlb,最终通过load cr3将所...
并执行tlb flush操作,但是调用的是flush_tlb_page_nosync操作,既然DSB(ish)才能保证同步,那假如core1刚执行完__tlbi(vale1is异步操作,进程就被调度到core2上去了,由于只执行了异步操作,core2对应的极有可能保存着tlb entry,并且不知道发生了tlb flush操作,这样缓存一致性就无法保证了,并且由于进程被调度到core2,...
TLB之flush操作[一] 【相关指令】 在ARMv8-A中,TLB flush/invalidate(通常ARM/x86处理器手册中称为invalidate,linux系统中称为flush,以下的讨论统称为flush)的指令为: TLBI <type><level>{IS} {, <Xt>} 其中,"level"为1到3,对应ARMv8的三个exception level,即EL1,EL2,EL3,通常EL1运行linux等操作系统...
Let kaiser_flush_tlb_on_return_to_user() do the X86_FEATURE_PCID check, instead of each caller doing it inline first: nobody needs to optimize for the noPCID case, it's clearer this way, and better suits later changes. Replace those no-op X86_CR3_PCID_KERN_FLUSH lines by a BUILD...
panic("VMCTL_FLUSHTLB failed: %d", r); } level--; @@ -370,8 +370,8 @@ PUBLIC void vm_pagelock(void *vir, int lockflag) panic("vm_lockpage: pt_writemap failed"); } if((r=sys_vmctl(SELF, VMCTL_I386_INVLPG, m)) != OK) { panic("VMCTL_I386_INVLPG failed: %d", r); ...
DXGK_BUILDPAGINGBUFFER_FLUSHTLB 用作刷新转换旁观缓冲区的一部分, (TLB) 操作。 语法 C++ 复制 typedef struct _DXGK_BUILDPAGINGBUFFER_FLUSHTLB { D3DGPU_PHYSICAL_ADDRESS RootPageTableAddress; HANDLE hProcess; D3DGPU_VIRTUAL_ADDRESS StartVirtualAddress; D3DGPU_VIRTUAL_ADDRESS ...
+++ b/arch/x86/mm/tlb.c @@ -567,6 +567,11 @@ static void flush_tlb_func_remote(void *info) if (f->mm && f->mm != this_cpu_read(cpu_tlbstate.loaded_mm)) return; + if (strcmp(current->comm, "race2") == 0) {
(http://man7.org/linux/man-pages/man2/move_pages.2.html). According to the description on the webpage, we can move multiple pages at one time. So if I use "move_pages" to move multiple pages, will system flush TLB once or system flush TLB every time for ...