linux-kernel - [PATCH 0/3] dax: clear poison on the fly along pwrite

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210914233132.3680546-1-jane.chu@oracle.com>
Date:   Tue, 14 Sep 2021 17:31:28 -0600
From:   Jane Chu <jane.chu@...cle.com>
To:     dan.j.williams@...el.com, vishal.l.verma@...el.com,
        dave.jiang@...el.com, ira.weiny@...el.com, viro@...iv.linux.org.uk,
        willy@...radead.org, jack@...e.cz, nvdimm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 0/3] dax: clear poison on the fly along pwrite

If pwrite(2) encounters poison in a pmem range, it fails with EIO.
This is unecessary if hardware is capable of clearing the poison.

Though not all dax backend hardware has the capability of clearing
poison on the fly, but dax backed by Intel DCPMEM has such capability,
and it's desirable to, first, speed up repairing by means of it;
second, maintain backend continuity instead of fragmenting it in
search for clean blocks.

Jane Chu (3):
  dax: introduce dax_operation dax_clear_poison
  dax: introduce dax_clear_poison to dax pwrite operation
  libnvdimm/pmem: Provide pmem_dax_clear_poison for dax operation

 drivers/dax/super.c   | 13 +++++++++++++
 drivers/nvdimm/pmem.c | 17 +++++++++++++++++
 fs/dax.c              |  9 +++++++++
 include/linux/dax.h   |  6 ++++++
 4 files changed, 45 insertions(+)

-- 
2.18.4