> -----Original Message----- > From: H. Peter Anvin [mailto:h...@zytor.com] > Sent: Tuesday, February 25, 2014 1:52 AM > To: Hansen, Dave; Ren, Qiaowei; Thomas Gleixner; Ingo Molnar > Cc: x...@kernel.org; linux-kernel@vger.kernel.org > Subject: Re: [PATCH v5 2/3] x86, mpx: hook #BR exception handler to allocate > bound tables > > On 02/24/2014 09:27 AM, Dave Hansen wrote: > > > > Can you talk a little bit about what the design is here? Why does the > > kernel have to do the allocation of the virtual address space? Does > > it really need to MAP_POPULATE? bt_size looks like 4MB, and that's an > > awful lot of memory to eat up at once. Shouldn't we just let the > > kernel demand-fault this like everything else? > > > > MAP_POPULATE definitely seems like the wrong thing. > Oh. This option should be removed.
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