Hello, On Mon, Sep 09, 2013 at 07:56:34PM +0800, Wanpeng Li wrote: > If allocate from low to high as what this patchset done will occupy the > precious memory you mentioned? Yeah, and that'd be the reason why this behavior is dependent on a kernel option. That said, allocating some megs on top of kernel isn't a big deal. The wretched ISA DMA is mostly gone now and some megs isn't gonna hurt 32bit DMAs in any noticeable way. I wouldn't be too surprised if nobody notices after switching the default behavior to allocate early mem close to kernel. Maybe the only case which might be impacted is 32bit highmem configs, but they're messed up no matter what anyway and even they shouldn't be affected noticeably if large mapping is in use. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
