Ira Weiny wrote: > Alison Schofield wrote: > > On Fri, Mar 27, 2026 at 09:03:26PM +0000, John Groves wrote: > > > From: John Groves <[email protected]> > > >
[snip] > > > > > > Description: > > > > > > This patch series introduces the required dax support for famfs. > > > Previous versions of the famfs series included both dax and fuse patches. > > > This series separates them into separate patch series' (and the fuse > > > series dependends on this dax series). > > > > > > The famfs user space code can be found at [1] > > > > > > Dax Overview: > > > > > > This series introduces a new "famfs mode" of devdax, whose driver is > > > drivers/dax/fsdev.c. This driver supports dax_iomap_rw() and > > > dax_iomap_fault() calls against a character dax instance. A dax device > > > now can be converted among three modes: 'system-ram', 'devdax' and > > > 'famfs' via daxctl or sysfs (e.g. unbind devdax and bind famfs instead). > > > > > > In famfs mode, a dax device initializes its pages consistent with the > > > fsdaxmode of pmem. Raw read/write/mmap are not supported in this mode, > > > but famfs is happy in this mode - using dax_iomap_rw() for read/write and > > > dax_iomap_fault() for mmap faults. > > > > > > > Here's what I found: > > > > famfs-v10 on 7.0-rc5 + ndctl v84: > > dax suite all pass 13/13, so no regression appears > > > > famfs-v10 on 7.0-rc5 + > > (ndctl v84 w https://github.com/jagalactic/ndctl/tree/famfs > > top 3 patches + edit daxctl-famfs.sh to use cxl-test: > > > > existing dax suite keeps passing > > daxctl-famfs.sh oops w the new test at # Restore original mode" > > seems easy to repoduce, maybe cannot go back to system-ram??? > > John have you been able to reproduce this? > > Ira
