From: Wei Liu <wl@xen.org>
To: Jan Beulich <jbeulich@suse.com>
Cc: "Hongyan Xia" <hx242@xen.org>,
julien@xen.org, "Wei Liu" <wl@xen.org>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
xen-devel@lists.xenproject.org,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [PATCH 1/2] x86: drop unnecessary page table walking in compat r/o M2P handling
Date: Wed, 15 Apr 2020 12:16:09 +0100 [thread overview]
Message-ID: <20200415111609.6xmfmlc2ygwwon4n@debian> (raw)
In-Reply-To: <61746eff-0033-ccd7-6d77-3aabb8a426c8@suse.com>
On Wed, Apr 15, 2020 at 10:23:31AM +0200, Jan Beulich wrote:
> We have a global variable where the necessary L2 table is recorded; no
> need to inspect L4 and L3 tables (and this way a few less places will
> eventually need adjustment when we want to support 5-level page tables).
> Also avoid setting up the L3 entry, as the address range never gets used
> anyway (it'll be dropped altogether in a subsequent patch).
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Wei Liu <wl@xen.org>
next prev parent reply other threads:[~2020-04-15 11:16 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-08 13:36 [PATCH v2 0/5] use new API for Xen page tables Hongyan Xia
2020-04-08 13:36 ` [PATCH v2 1/5] x86/shim: map and unmap page tables in replace_va_mapping Hongyan Xia
2020-04-09 9:42 ` Jan Beulich
2020-04-14 16:53 ` Hongyan Xia
2020-04-15 6:13 ` Jan Beulich
2020-04-08 13:36 ` [PATCH v2 2/5] x86_64/mm: map and unmap page tables in m2p_mapped Hongyan Xia
2020-04-15 7:54 ` Jan Beulich
2020-04-08 13:36 ` [PATCH v2 3/5] x86_64/mm: map and unmap page tables in share_hotadd_m2p_table Hongyan Xia
2020-04-15 7:55 ` Jan Beulich
2020-04-08 13:36 ` [PATCH v2 4/5] x86_64/mm: map and unmap page tables in destroy_compat_m2p_mapping Hongyan Xia
2020-04-15 8:21 ` [PATCH 0/2] x86: high compat r/o M2P table handling adjustments Jan Beulich
2020-04-15 8:23 ` [PATCH 1/2] x86: drop unnecessary page table walking in compat r/o M2P handling Jan Beulich
2020-04-15 9:59 ` Hongyan Xia
2020-04-15 10:34 ` Jan Beulich
2020-04-15 10:50 ` Hongyan Xia
2020-04-15 11:16 ` Wei Liu [this message]
2020-04-15 8:23 ` [PATCH 2/2] x86: drop high compat r/o M2P table address range Jan Beulich
2020-04-27 19:52 ` Wei Liu
2020-04-28 6:14 ` [PATCH 0/2] x86: high compat r/o M2P table handling adjustments Jan Beulich
2020-04-15 8:25 ` [PATCH v2 4/5] x86_64/mm: map and unmap page tables in destroy_compat_m2p_mapping Jan Beulich
2020-04-08 13:36 ` [PATCH v2 5/5] x86_64/mm: map and unmap page tables in destroy_m2p_mapping Hongyan Xia
2020-04-15 8:32 ` Jan Beulich
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