diff options
| author | Alex Shi <alex.shi@intel.com> | 2012-08-24 10:55:13 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-05 16:50:21 +0200 |
| commit | ce7184bdbd38d920fb515266fbbdc585ad2e5493 (patch) | |
| tree | 0f9f9fae086368925f6cf4f3053cb1ea92a5adca | |
| parent | Merge commit '4cb38750d49010ae72e718d46605ac9ba5a851b4' into stable/for-linus... (diff) | |
| download | linux-ce7184bdbd38d920fb515266fbbdc585ad2e5493.tar.xz linux-ce7184bdbd38d920fb515266fbbdc585ad2e5493.zip | |
xen: fix logical error in tlb flushing
While TLB_FLUSH_ALL gets passed as 'end' argument to
flush_tlb_others(), the Xen code was made to check its 'start'
parameter. That may give a incorrect op.cmd to MMUEXT_INVLPG_MULTI
instead of MMUEXT_TLB_FLUSH_MULTI. Then it causes some page can not
be flushed from TLB.
This patch fixed this issue.
Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Alex Shi <alex.shi@intel.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Tested-by: Yongjie Ren <yongjie.ren@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | arch/x86/xen/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index b65a76133f4f..5141d808e751 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -1283,7 +1283,7 @@ static void xen_flush_tlb_others(const struct cpumask *cpus, cpumask_clear_cpu(smp_processor_id(), to_cpumask(args->mask)); args->op.cmd = MMUEXT_TLB_FLUSH_MULTI; - if (start != TLB_FLUSH_ALL && (end - start) <= PAGE_SIZE) { + if (end != TLB_FLUSH_ALL && (end - start) <= PAGE_SIZE) { args->op.cmd = MMUEXT_INVLPG_MULTI; args->op.arg1.linear_addr = start; } |