On 03/16/2015 11:12 PM, 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, which has been merged into the v4.0 kernel series. > > For more information on PMEM and for some instructions on how to use it, please > check out PMEM's github tree: > > https://github.com/01org/prd > > Cc: linux-nvdimm@xxxxxxxxxxxx > Cc: linux-fsdevel@xxxxxxxxxxxxxxx > Cc: axboe@xxxxxxxxx > Cc: hch@xxxxxxxxxxxxx > Cc: riel@xxxxxxxxxx > > Boaz Harrosh (1): > pmem: Let each device manage private memory region > Not signed-off-by me. > Ross Zwisler (5): > pmem: Initial version of persistent memory driver This is the wrong code > pmem: Add support for getgeo() We do not need this patch > pmem: Add support for rw_page() > pmem: Add support for direct_access() > pmem: Clean up includes > NACK! This is the wrong pmem driver, the wrong API and the wrong bad copy/paste from brd code. (And thanks Ross for not CCing me I have lots of mail to read every day, Seriously this is rude, what do I need to feel?) And very Seriously. Ross what is that joke Kconfig and module-param API, how it is relevant to anything and how it is getting us close to what pmem really needs to be, with the auto-probe. Is this your wait wait we done lots of new work on this? It did not change one bit from the original brd copy/paste. Boaz > MAINTAINERS | 6 + > drivers/block/Kconfig | 41 +++++ > drivers/block/Makefile | 1 + > drivers/block/pmem.c | 401 +++++++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 449 insertions(+) > create mode 100644 drivers/block/pmem.c > -- 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
