On 08/28/2014 12:11 AM, Ross Zwisler wrote: > PMEM is a modified version of the Block RAM Driver, BRD. The major difference > is that BRD allocates its backing store pages from the page cache, whereas > PMEM uses reserved memory that has been ioremapped. > > One benefit of this approach is that there is a direct mapping between > filesystem block numbers and virtual addresses. In PMEM, filesystem blocks N, > N+1, N+2, etc. will all be adjacent in the virtual memory space. This property > allows us to set up PMD mappings (2 MiB) for DAX. > > This patch set is builds upon the work that Matthew Wilcox has been doing for > DAX: > Let us not submit a driver with the wrong user visible API. Lets submit the better API (and structure) I have sent. > https://lkml.org/lkml/2014/8/27/31 > > Specifically, my implementation of pmem_direct_access() in patch 4/4 uses API > enhancements introduced in Matthew's DAX patch v10 02/21: > > https://lkml.org/lkml/2014/8/27/48 > > Ross Zwisler (4): > pmem: Initial version of persistent memory driver > pmem: Add support for getgeo() > pmem: Add support for rw_page() > pmem: Add support for direct_access() > On top of the 4 above patches here is a list of changes: [PATCH 1/9] SQUASHME: pmem: Remove unused #include headers [PATCH 2/9] SQUASHME: pmem: Request from fdisk 4k alignment [PATCH 3/9] SQUASHME: pmem: Let each device manage private memory region [PATCH 4/9] SQUASHME: pmem: Support of multiple memory regions These 4 need to be squashed into Ross's [patch 1/4] pmem: Initial version of persistent memory driver See below for a suggested new patch [PATCH 5/9 v2] mm: Let sparse_{add,remove}_one_section receive a node_id [PATCH 6/9 v2] mm: New add_persistent_memory/remove_persistent_memory [PATCH 7/9 v2] pmem: Add support for page structs Please need review by Toshi and mm people. [PATCH 8/9] SQUASHME: pmem: Fixs to getgeo [PATCH 9/9] pmem: KISS, remove register_blkdev And some more development atop the initial version All these patches can be viewed in this tree/branch: git://git.open-osd.org/pmem.git branch pmem-jens-3.17-rc1 [http://git.open-osd.org/gitweb.cgi?p=pmem.git;a=shortlog;h=refs/heads/pmem-jens-3.17-rc1] I have also prepared a new branch *pmem* which is already SQUASHED And has my suggested changed commit logs for the combined patches here is the commit-log: aa85c80 Boaz Harrosh | pmem: KISS, remove register_blkdev 738203c Boaz Harrosh | pmem: Add support for page structs 9f50a54 Boaz Harrosh | mm: New add_persistent_memory/remove_persistent_memory fdfab12 Yigal Korman | mm: Let sparse_{add,remove}_one_section receive a node_id a477a87 Ross Zwisler | pmem: Add support for direct_access() 316a93a Ross Zwisler | pmem: Add support for rw_page() 6850353 Boaz Harrosh | SQUASHME: pmem: Fixs to getgeo d78a84a Ross Zwisler | pmem: Add support for getgeo() bb0eb45 Ross Zwisler | pmem: Initial version of persistent memory driver All these patches can be viewed in this tree/branch: git://git.open-osd.org/pmem.git branch pmem [http://git.open-osd.org/gitweb.cgi?p=pmem.git;a=shortlog;h=refs/heads/pmem] Specifically the first [bb0eb45] is needed so first version can be released with the proper user visible API. Ross please consider taking these patches (pmem branch) in your tree for submission? Thanks Boaz -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
