Re: [PATCH v11 0/2] mm, pmem, xfs: Introduce MF_MEM_REMOVE for unbind

[Shiyang Ruan <ruansy.fnst@fujitsu.com>]

Ping

在 2023/3/28 17:41, Shiyang Ruan 写道:
> This patchset is to add gracefully unbind support for pmem.
> Patch1 corrects the calculation of length and end of a given range.
> Patch2 introduces a new flag call MF_MEM_REMOVE, to let dax holder know
> it is a remove event.  With the help of notify_failure mechanism, we are
> able to shutdown the filesystem on the pmem gracefully.
> 
> Changes since v10:
>   Patch1:
>    1. correct the count calculation in xfs_failure_pgcnt().
>   Patch2:
>    2. drop the patch which introduces super_drop_pagecache().
>    3. in mf_dax_kill_procs(), don't SetPageHWPoison() and search for all
>        tasks while mf_flags has MF_MEM_PRE_REMOVE.
>    4. only do mf_dax_kill_procs() on dax mapping.
>    5. do invalidate_inode_pages2_range() for each file found during rmap,
>        to make sure the dax entry are disassociated before pmem is gone.
>        Otherwise, umount filesystem after unbind will cause crash because
>        the dax entries have to be disassociated but now the pmem is not
>        exist.
> 
>    For detail analysis of this change, please refer this link[1].
> 
> [1] https://lore.kernel.org/linux-xfs/b1d9fc03-1a71-a75f-f87b-5819991e4eb2@fujitsu.com/
> 
> Shiyang Ruan (2):
>    xfs: fix the calculation of length and end
>    mm, pmem, xfs: Introduce MF_MEM_REMOVE for unbind
> 
>   drivers/dax/super.c         |  3 +-
>   fs/xfs/xfs_notify_failure.c | 66 +++++++++++++++++++++++++++++++------
>   include/linux/mm.h          |  1 +
>   mm/memory-failure.c         | 17 +++++++---
>   4 files changed, 72 insertions(+), 15 deletions(-)
>