From: Michal Hocko <mhocko@kernel.org>
To: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Rob Gardner <rob.gardner@oracle.com>,
davem@davemloft.net, corbet@lwn.net, arnd@arndb.de,
akpm@linux-foundation.org, hpa@zytor.com,
viro@zeniv.linux.org.uk, nitin.m.gupta@oracle.com,
chris.hyser@oracle.com, tushar.n.dave@oracle.com,
sowmini.varadhan@oracle.com, mike.kravetz@oracle.com,
adam.buchbinder@gmail.com, minchan@kernel.org, hughd@google.com,
kirill.shutemov@linux.intel.com, keescook@chromium.org,
allen.pais@oracle.com, aryabinin@virtuozzo.com,
atish.patra@oracle.com, joe@perches.com, pmladek@suse.com,
jslaby@suse.cz, cmetcalf@mellanox.com,
paul.gortmaker@windriver.com, jmarchan@redhat.com,
lstoakes@gmail.com, 0x7f454c46@gmail.com, vbabka@suse.cz,
tglx@linutronix.de, mingo@redhat.com, dan.j.williams@intel.com,
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vdavydov.dev@gmail.com, hannes@cmpxchg.org, namit@vmware.com,
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sparclinux@vger.kernel.org, linux-arch@vger.kernel.org,
x86@kernel.org, linux-mm@kvack.org,
Khalid Aziz <khalid@gonehiking.org>
Subject: Re: [RFC PATCH v3] sparc64: Add support for Application Data Integrity (ADI)
Date: Fri, 6 Jan 2017 10:19:34 +0100 [thread overview]
Message-ID: <20170106091934.GF5556@dhcp22.suse.cz> (raw)
In-Reply-To: <7fbc4ca1-22ef-8ef5-5c1b-dd075852e512@oracle.com>
On Thu 05-01-17 13:30:10, Khalid Aziz wrote:
[...]
> It is very tempting to restrict tags to PAGE_SIZE granularity since it makes
> code noticeably simpler and that is indeed going to be the majority of
> cases. Sooner or later somebody would want to use multiple tags per page
> though.
I didn't get to read the patch throughly yet but I am really confused by
this statement. The api is mprotect based which makes it ineherently
PAGE_SIZE granular. How do you want to achieve cache line granularity
with this API?
And I would really vote for simplicity first... Subpage granularity
sounds way too tricky...
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-01-06 9:19 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-04 22:46 [RFC PATCH v3] sparc64: Add support for Application Data Integrity (ADI) Khalid Aziz
2017-01-04 23:27 ` Dave Hansen
2017-01-04 23:35 ` Rob Gardner
2017-01-04 23:40 ` Dave Hansen
2017-01-04 23:44 ` Rob Gardner
2017-01-04 23:49 ` Dave Hansen
2017-01-04 23:56 ` Rob Gardner
2017-01-04 23:58 ` Khalid Aziz
2017-01-05 0:01 ` Dave Hansen
2017-01-05 0:05 ` Rob Gardner
2017-01-05 0:14 ` Dave Hansen
2017-01-05 0:26 ` Khalid Aziz
2017-01-05 19:22 ` Dave Hansen
2017-01-05 20:30 ` Khalid Aziz
2017-01-06 9:19 ` Michal Hocko [this message]
2017-01-06 15:32 ` Khalid Aziz
2017-01-06 15:36 ` Dave Hansen
2017-01-06 16:22 ` Khalid Aziz
2017-01-06 16:25 ` David Miller
2017-01-06 16:55 ` Dave Hansen
2017-01-06 17:02 ` David Miller
2017-01-06 17:10 ` Khalid Aziz
2017-01-06 17:54 ` Rob Gardner
2017-01-06 18:18 ` Khalid Aziz
2017-01-06 18:28 ` Rob Gardner
2017-01-06 17:08 ` Khalid Aziz
2017-01-04 23:43 ` Khalid Aziz
2017-01-04 23:31 ` Dave Hansen
2017-01-04 23:46 ` Khalid Aziz
2017-01-04 23:50 ` Dave Hansen
2017-01-05 9:37 ` Jerome Marchand
2017-01-05 15:13 ` Khalid Aziz
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