Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Mon, Jan 25, 2016 at 1:18 PM, Jared Hulbert wrote: > On Mon, Jan 25, 2016 at 8:52 AM, Matthew Wilcox wrote: >> On Sun, Jan 24, 2016 at 01:03:49AM -0800, Jared Hulbert wrote: >>> I our defense we didn't know we were sinning at the time. >> >> Fair enough. Cache flushing is Hard. >> >>> Can

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Mon, Jan 25, 2016 at 1:18 PM, Jared Hulbert wrote: > On Mon, Jan 25, 2016 at 8:52 AM, Matthew Wilcox wrote: >> On Sun, Jan 24, 2016 at 01:03:49AM -0800, Jared Hulbert wrote: >>> I our defense we didn't know we were sinning at the time. >> >> Fair

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Mon, Jan 25, 2016 at 8:52 AM, Matthew Wilcox wrote: > On Sun, Jan 24, 2016 at 01:03:49AM -0800, Jared Hulbert wrote: >> I our defense we didn't know we were sinning at the time. > > Fair enough. Cache flushing is Hard. > >> Can you walk me through the cache flushing hole? How is it okay on

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Sun, Jan 24, 2016 at 01:03:49AM -0800, Jared Hulbert wrote: > I our defense we didn't know we were sinning at the time. Fair enough. Cache flushing is Hard. > Can you walk me through the cache flushing hole? How is it okay on > X86 but not VIVT archs? I'm missing something obvious here. >

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Sun, Jan 24, 2016 at 01:03:49AM -0800, Jared Hulbert wrote: > I our defense we didn't know we were sinning at the time. Fair enough. Cache flushing is Hard. > Can you walk me through the cache flushing hole? How is it okay on > X86 but not VIVT archs? I'm missing something obvious here. >

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Mon, Jan 25, 2016 at 8:52 AM, Matthew Wilcox wrote: > On Sun, Jan 24, 2016 at 01:03:49AM -0800, Jared Hulbert wrote: >> I our defense we didn't know we were sinning at the time. > > Fair enough. Cache flushing is Hard. > >> Can you walk me through the cache flushing

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

I our defense we didn't know we were sinning at the time. Can you walk me through the cache flushing hole? How is it okay on X86 but not VIVT archs? I'm missing something obvious here. I thought earlier that vm_insert_mixed() handled the necessary flushing. Is that even the part you are

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

I our defense we didn't know we were sinning at the time. Can you walk me through the cache flushing hole? How is it okay on X86 but not VIVT archs? I'm missing something obvious here. I thought earlier that vm_insert_mixed() handled the necessary flushing. Is that even the part you are

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Fri, Jan 22, 2016 at 01:48:08PM +, Chris Brandt wrote: > I believe the motivation for the new DAX code was being able to > read/write data directly to specific physical memory. However, with > the AXFS file system, XIP file mapping was mostly beneficial for direct > access to executable

RE: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

; Carsten Otte ; Chris Brandt Subject: RE: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation Hi Jared, The old filemap_xip code was living in a state of sin ;-) It was writing to the kernel's mapping of an address, and then not flushing the cache before telling userspace

RE: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

andt Subject: Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation HI! I've been out of the community for a while, but I'm trying to step back in here and catch up with some of my old areas of specialty. Couple questions, sorry to drag up such old conversations. The

RE: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

andt Subject: Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation HI! I've been out of the community for a while, but I'm trying to step back in here and catch up with some of my old areas of specialty. Couple questions, sorry to drag up such old conversations. The

RE: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

lt;linux-kernel@vger.kernel.org>; Linux Memory Management List <linux...@kvack.org>; Matthew Wilcox <wi...@linux.intel.com>; Andrew Morton <a...@linux-foundation.org>; Carsten Otte <co...@de.ibm.com>; Chris Brandt <chris.bra...@renesas.com> Subject: RE: [PATCH v1

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Fri, Jan 22, 2016 at 01:48:08PM +, Chris Brandt wrote: > I believe the motivation for the new DAX code was being able to > read/write data directly to specific physical memory. However, with > the AXFS file system, XIP file mapping was mostly beneficial for direct > access to executable

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

HI! I've been out of the community for a while, but I'm trying to step back in here and catch up with some of my old areas of specialty. Couple questions, sorry to drag up such old conversations. The DAX documentation that made it into kernel 4.0 has the following line "The DAX code does not

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

HI! I've been out of the community for a while, but I'm trying to step back in here and catch up with some of my old areas of specialty. Couple questions, sorry to drag up such old conversations. The DAX documentation that made it into kernel 4.0 has the following line "The DAX code does not

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Fri, 24 Oct 2014 17:20:42 -0400 Matthew Wilcox wrote: > Based on the original XIP documentation, this documents the current > state of affairs, and includes instructions on how users can enable DAX > if their devices and kernel support it. Nice ;) -- To unsubscribe from this list: send the

Re: [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation

On Fri, 24 Oct 2014 17:20:42 -0400 Matthew Wilcox matthew.r.wil...@intel.com wrote: Based on the original XIP documentation, this documents the current state of affairs, and includes instructions on how users can enable DAX if their devices and kernel support it. Nice ;) -- To unsubscribe