nvdimm.lists.linux.dev archive mirror
 help / color / mirror / Atom feed
From: Jane Chu <jane.chu@oracle.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Borislav Petkov <bp@alien8.de>,
	Linux NVDIMM <nvdimm@lists.linux.dev>,
	Luis Chamberlain <mcgrof@suse.com>,
	Tony Luck <tony.luck@intel.com>
Subject: Re: [RFT PATCH] x86/pat: Fix set_mce_nospec() for pmem
Date: Thu, 30 Sep 2021 14:23:29 -0700	[thread overview]
Message-ID: <62ea20e1-909e-8fc5-4ba2-381bac0b3dc9@oracle.com> (raw)
In-Reply-To: <CAPcyv4gvnkDNBNnUdX0YeCoQiJ2BNs40wyy3mMkeYuz=GoUakA@mail.gmail.com>


On 9/30/2021 12:11 PM, Dan Williams wrote:
> On Thu, Sep 30, 2021 at 11:15 AM Jane Chu <jane.chu@oracle.com> wrote:
>>
>> Hi, Dan,
>>
>> On 9/16/2021 1:33 PM, Dan Williams wrote:
>>> The new consideration of
>>> whole_page() errors means that the code in nfit_handle_mce() is wrong
>>> to assume that the length of the error is just 1 cacheline. When that
>>> bug is fixed the badblocks range will cover the entire page in
>>> whole_page() notification cases.
>>
>> Does this explain what I saw a while ago: inject two poisons
>> to the same block, and pwrite clears one poison at a time?
> 
> Potentially, yes. If you injected poison over 512 bytes then it could
> take 2 pwrites() of 256-bytes each to clear that poison. In the DAX
> case nothing is enforcing sector aligned I/O for pwrite().
> 

Thanks!

-jane

      reply	other threads:[~2021-09-30 21:23 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-07  1:01 [RFT PATCH] x86/pat: Fix set_mce_nospec() for pmem Dan Williams
2021-08-26 19:08 ` Dan Williams
2021-08-27  7:12   ` Jane Chu
2021-09-13 10:29 ` Borislav Petkov
2021-09-14 18:08   ` Dan Williams
2021-09-15 10:41     ` Borislav Petkov
2021-09-16 20:33       ` Dan Williams
2021-09-17 11:30         ` Borislav Petkov
2021-09-21  2:04           ` Dan Williams
2021-09-30 17:19             ` Borislav Petkov
2021-09-30 17:28               ` Luck, Tony
2021-09-30 19:30                 ` Borislav Petkov
2021-09-30 19:41                   ` Dan Williams
2021-09-30 19:44                   ` Luck, Tony
2021-09-30 20:01                     ` Borislav Petkov
2021-09-30 20:15                       ` Luck, Tony
2021-09-30 20:32                         ` Borislav Petkov
2021-09-30 20:39                           ` Dan Williams
2021-09-30 20:54                             ` Borislav Petkov
2021-09-30 21:05                               ` Dan Williams
2021-09-30 21:20                                 ` Borislav Petkov
2021-09-30 21:41                                   ` Dan Williams
2021-09-30 22:35                                     ` Borislav Petkov
2021-09-30 22:44                                       ` Dan Williams
2021-10-01 10:41                                         ` Borislav Petkov
2021-10-01  0:43                                       ` Jane Chu
2021-10-01  2:02                                         ` Dan Williams
2021-10-01 10:50                                           ` Borislav Petkov
2021-10-01 16:52                                             ` Dan Williams
2021-10-01 18:11                                               ` Borislav Petkov
2021-10-01 18:29                                                 ` Dan Williams
2021-10-02 10:17                                                   ` Borislav Petkov
2021-11-11  0:06                                                     ` Jane Chu
2021-11-12  0:30                                                       ` Jane Chu
2021-11-12  0:51                                                         ` Dan Williams
2021-11-12 17:57                                                           ` Jane Chu
2021-11-12 19:24                                                             ` Dan Williams
2021-11-12 22:35                                                               ` Jane Chu
2021-11-12 22:50                                                                 ` Jane Chu
2021-11-12 23:08                                                                 ` Dan Williams
2021-11-13  5:50                                                                   ` Jane Chu
2021-11-13 20:47                                                                     ` Dan Williams
2021-11-18 19:03                                                                       ` Jane Chu
2021-11-25  0:16                                                                         ` Dan Williams
2021-11-30 23:00                                                                           ` Jane Chu
2021-09-30 18:15         ` Jane Chu
2021-09-30 19:11           ` Dan Williams
2021-09-30 21:23             ` Jane Chu [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=62ea20e1-909e-8fc5-4ba2-381bac0b3dc9@oracle.com \
    --to=jane.chu@oracle.com \
    --cc=bp@alien8.de \
    --cc=dan.j.williams@intel.com \
    --cc=mcgrof@suse.com \
    --cc=nvdimm@lists.linux.dev \
    --cc=tony.luck@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).