> -----Original Message----- > From: Borislav Petkov [mailto:b...@alien8.de] > Sent: Monday, January 13, 2014 6:38 PM > To: Ren, Qiaowei > Cc: H. Peter Anvin; Thomas Gleixner; Ingo Molnar; x...@kernel.org; > linux-kernel@vger.kernel.org > Subject: Re: [PATCH 2/5] x86, mpx: hook #BR exception handler to allocate > bound tables > > On Mon, Jan 13, 2014 at 11:17:15AM +0800, Ren Qiaowei wrote: > > Yes, I run this with lockdep enabled. > > Ok, but you still are doing memory allocation in the exception handler, > AFAICT: > > do_bounds > |->do_mpx_bt_fault > |->allocate_bt > |->sys_mmap_pgoff > |->vm_mmap_pgoff > |->do_mmap_pgoff > |->mmap_region > |-> kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL); > Sorry for my late reply.
Petkov, could you please detail the problem? Memory allocation can't be done in the eception handler? I guess it is like do_page_fault(), right? Thanks, Qiaowei
