From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH v2 7/8] xen/x86: Use 2M superpages for text/data/bss mappings
Date: Wed, 24 Feb 2016 13:23:06 +0000 [thread overview]
Message-ID: <56CDAEBA.5010500@citrix.com> (raw)
In-Reply-To: <56CDAE70.6070100@citrix.com>
On 24/02/16 13:21, Andrew Cooper wrote:
> On 24/02/16 13:17, Jan Beulich wrote:
>>>>> On 23.02.16 at 17:31, <andrew.cooper3@citrix.com> wrote:
>>> This balloons the size of Xen in memory from 4.4MB to 8MB, because of the
>>> required alignment adjustments.
>> Interesting - on v1 it was 12Mb iirc, and aiui you folded just one
>> pair of 2M pages, which would yield 10M now; did you perhaps
>> not account for .text spanning 2 large pages, due to the 1M bias
>> it starts at? But anyway...
> The original 12 was me just counting 6 superpages. I forgot to account
> for the 1 released back because of .init (which I suppose is now in the
> following patch). That, combined with the alignment drop results in 4
> in-use superpages after boot.
This is perhaps more clear given the debugging shown in the cover letter.
~Andrew
next prev parent reply other threads:[~2016-02-24 13:23 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-23 16:31 [PATCH v2 0/8] Map Xen code/data/bss with superpages Andrew Cooper
2016-02-23 16:31 ` [PATCH v2 1/8] xen/lockprof: Move .lockprofile.data into .rodata Andrew Cooper
2016-02-24 11:16 ` Jan Beulich
2016-02-23 16:31 ` [PATCH v2 2/8] xen/x86: Improvements to build-time pagetable generation Andrew Cooper
2016-02-24 11:24 ` Jan Beulich
2016-02-24 13:57 ` Andrew Cooper
2016-02-24 14:15 ` Jan Beulich
2016-02-24 14:58 ` Andrew Cooper
2016-02-24 15:18 ` Jan Beulich
2016-02-24 15:22 ` Andrew Cooper
2016-02-24 15:48 ` Jan Beulich
2016-02-24 16:14 ` Andrew Cooper
2016-02-24 16:59 ` Jan Beulich
2016-02-24 17:28 ` Andrew Cooper
2016-02-23 16:31 ` [PATCH v2 3/8] xen/x86: Construct the {l2, l3}_bootmap at compile time Andrew Cooper
2016-02-24 11:34 ` Jan Beulich
2016-02-24 11:40 ` Andrew Cooper
2016-02-24 11:50 ` Jan Beulich
2016-02-24 12:07 ` Andrew Cooper
2016-02-23 16:31 ` [PATCH v2 4/8] xen/memguard: Drop memguard_init() entirely Andrew Cooper
2016-02-24 13:26 ` Jan Beulich
2016-02-24 15:02 ` Stefano Stabellini
2016-02-23 16:31 ` [PATCH v2 5/8] xen/x86: Disable CR0.WP while applying alternatives Andrew Cooper
2016-02-23 16:31 ` [PATCH v2 6/8] xen/x86: Reorder .data and .init when linking Andrew Cooper
2016-02-24 11:41 ` Jan Beulich
2016-02-24 11:44 ` Andrew Cooper
2016-02-23 16:31 ` [PATCH v2 7/8] xen/x86: Use 2M superpages for text/data/bss mappings Andrew Cooper
2016-02-24 13:17 ` Jan Beulich
2016-02-24 13:21 ` Andrew Cooper
2016-02-24 13:23 ` Andrew Cooper [this message]
2016-02-23 16:31 ` [PATCH v2 8/8] xen/x86: Unilaterally remove .init mappings Andrew Cooper
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=56CDAEBA.5010500@citrix.com \
--to=andrew.cooper3@citrix.com \
--cc=JBeulich@suse.com \
--cc=xen-devel@lists.xen.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.