On Tue, Jun 02, 2015 at 12:46:48PM -0600, Toshi Kani wrote: > On Tue, 2015-06-02 at 18:21 +0200, Luis R. Rodriguez wrote: > > On Mon, Jun 01, 2015 at 01:36:23PM -0600, Toshi Kani wrote: > > > This patchset adds support of Write-Through (WT) mapping on x86. > > > The study below shows that using WT mapping may be useful for > > > non-volatile memory. > > > > > > http://www.hpl.hp.com/techreports/2012/HPL-2012-236.pdf > > > > > > The patchset consists of the following changes. > > > - Patch 1/10 to 6/10 add ioremap_wt() > > > - Patch 7/10 adds pgprot_writethrough() > > > - Patch 8/10 to 9/10 add set_memory_wt() > > > - Patch 10/10 changes the pmem driver to call ioremap_wt() > > > > > > All new/modified interfaces have been tested. > > > > > > The patchset is based on: > > > git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git#tip-mm-2 > > > > While at it can you also look at: > > > > mcgrof@ergon ~/linux-next (git::master)$ git grep -4 "writethrough" drivers/infiniband/ > > Thanks for checking this. The inifiniband driver uses WT mappings on > powerpc without proper WT interfaces defined. Right. > They can be cleaned up by > a separate patch series to support WT on powerpc in the same way after > this patchset (support WT on x86) is settled. Who's gonna do that work though? How much work is it ? Is it too much to ask to roll it in this series? Luis -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>