On Wed, 21 Sep 2022, Gao Xiang wrote: > On Tue, Sep 20, 2022 at 01:52:38PM -0400, Mikulas Patocka wrote: > > Hi > > > > Here I'm sending second version of the brd discard patches. > > That is quite interesting. > > btw, something out of topic, I once had some preliminary attempt > to add DAX support to brd since brd works as ramdisk and brd-dax > could have the following benefits: > > - DAX can be tested without PMEM devices; > - ramdisk fses can be accessed without double page cache; > - initrd use cases then can work well without extra page cache > and maybe it can perform better than initramfs (without unpack > process). > > I wrote some hack stuff but don't have more time working on it... > https://git.kernel.org/pub/scm/linux/kernel/git/xiang/linux.git/log/?h=erofs/initrd-fsdax > > I'm not sure if others are interested in topic though. > > It would be helpful to get rid of all brd page->index use cases > first. > > Thanks, > Gao Xiang Hi Ramdisk DAX was there in the past, but it was removed in the kernel 4.15. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
