From: Tamas K Lengyel <tamas@tklengyel.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: "Tamas K Lengyel" <tamas.lengyel@intel.com>,
"Wei Liu" <wl@xen.org>,
"George Dunlap" <george.dunlap@eu.citrix.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
Xen-devel <xen-devel@lists.xenproject.org>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH v4 06/18] x86/mem_sharing: define mem_sharing_domain to hold some scattered variables
Date: Thu, 16 Jan 2020 09:05:58 -0700 [thread overview]
Message-ID: <CABfawhkWzi9b7xkOtUE+VZm9JRej1SSJvC7ROoK1rHCtWfpxNQ@mail.gmail.com> (raw)
In-Reply-To: <e1fe9e56-919a-409d-c01a-1453d0338dcf@suse.com>
On Thu, Jan 16, 2020 at 8:23 AM Jan Beulich <jbeulich@suse.com> wrote:
>
> On 08.01.2020 18:14, Tamas K Lengyel wrote:
> > Create struct mem_sharing_domain under hvm_domain and move mem sharing
> > variables into it from p2m_domain and hvm_domain.
> >
> > Expose the mem_sharing_enabled macro to be used consistently across Xen.
> >
> > Remove some duplicate calls to mem_sharing_enabled in mem_sharing.c
> >
> > Signed-off-by: Tamas K Lengyel <tamas.lengyel@intel.com>
>
> Acked-by: Jan Beulich <jbeulich@suse.com>
> with one question:
>
> > @@ -192,6 +192,10 @@ struct hvm_domain {
> > struct vmx_domain vmx;
> > struct svm_domain svm;
> > };
> > +
> > +#ifdef CONFIG_MEM_SHARING
> > + struct mem_sharing_domain mem_sharing;
> > +#endif
>
> Are you intending to add fields to this new struct? If so,
> should the field here become a pointer, and the structure
> allocated only when actually needed?
>
At the moment there are no additional variables planned to be added.
If/when we do we can consider turning this into a pointer, at which
point we can also get rid of the "enabled" field and turn the
mem_sharing_enabled macro into a NULL-pointer check instead. For now I
wouldn't bother because its not like we save much by doing so.
Thanks,
Tamas
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next prev parent reply other threads:[~2020-01-16 16:07 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 17:13 [Xen-devel] [PATCH v4 00/18] VM forking Tamas K Lengyel
2020-01-08 17:13 ` [Xen-devel] [PATCH v4 01/18] x86/hvm: introduce hvm_copy_context_and_params Tamas K Lengyel
2020-01-16 12:27 ` Jan Beulich
2020-01-16 14:06 ` Tamas K Lengyel
2020-01-08 17:13 ` [Xen-devel] [PATCH v4 02/18] xen/x86: Make hap_get_allocation accessible Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 03/18] x86/mem_sharing: make get_two_gfns take locks conditionally Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 04/18] x86/mem_sharing: drop flags from mem_sharing_unshare_page Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 05/18] x86/mem_sharing: don't try to unshare twice during page fault Tamas K Lengyel
2020-01-16 14:53 ` Jan Beulich
2020-01-16 15:59 ` Tamas K Lengyel
2020-01-16 16:03 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 06/18] x86/mem_sharing: define mem_sharing_domain to hold some scattered variables Tamas K Lengyel
2020-01-16 15:23 ` Jan Beulich
2020-01-16 16:05 ` Tamas K Lengyel [this message]
2020-01-16 16:08 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 07/18] x86/mem_sharing: Use INVALID_MFN and p2m_is_shared in relinquish_shared_pages Tamas K Lengyel
2020-01-16 15:40 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 08/18] x86/mem_sharing: Make add_to_physmap static and shorten name Tamas K Lengyel
2020-01-16 15:40 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 09/18] x86/mem_sharing: Convert MEM_SHARING_DESTROY_GFN to a bool Tamas K Lengyel
2020-01-16 15:42 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 10/18] x86/mem_sharing: Replace MEM_SHARING_DEBUG with gdprintk Tamas K Lengyel
2020-01-16 16:01 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 11/18] x86/mem_sharing: ASSERT that p2m_set_entry succeeds Tamas K Lengyel
2020-01-16 16:07 ` Jan Beulich
2020-01-16 16:12 ` Tamas K Lengyel
2020-01-17 9:23 ` Jan Beulich
2020-01-17 16:59 ` Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 12/18] x86/mem_sharing: Enable mem_sharing on first memop Tamas K Lengyel
2020-01-16 16:18 ` Jan Beulich
2020-01-16 16:34 ` Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 13/18] x86/mem_sharing: Skip xen heap pages in memshr nominate Tamas K Lengyel
2020-01-20 16:23 ` Jan Beulich
2020-01-20 16:32 ` Tamas K Lengyel
2020-01-20 16:38 ` Jan Beulich
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 14/18] x86/mem_sharing: check page type count earlier Tamas K Lengyel
2020-01-20 16:34 ` Jan Beulich
2020-01-20 16:46 ` Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 15/18] xen/mem_sharing: VM forking Tamas K Lengyel
2020-01-09 10:28 ` Julien Grall
2020-01-09 13:41 ` Tamas K Lengyel
2020-01-09 15:10 ` Roger Pau Monné
2020-01-09 15:34 ` Jan Beulich
2020-01-09 15:57 ` Tamas K Lengyel
2020-01-09 16:03 ` Jan Beulich
2020-01-09 16:06 ` Tamas K Lengyel
2020-01-09 15:54 ` Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 16/18] xen/mem_access: Use __get_gfn_type_access in set_mem_access Tamas K Lengyel
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 17/18] x86/mem_sharing: reset a fork Tamas K Lengyel
2020-01-09 10:30 ` Julien Grall
2020-01-08 17:14 ` [Xen-devel] [PATCH v4 18/18] xen/tools: VM forking toolstack side Tamas K Lengyel
2020-01-16 15:47 ` [Xen-devel] [PATCH v4 00/18] VM forking Jan Beulich
2020-01-16 16:24 ` Tamas K Lengyel
2020-01-17 9:12 ` Jan Beulich
2020-01-17 11:15 ` Anthony PERARD
2020-01-17 14:22 ` Tamas K Lengyel
2020-01-17 14:25 ` Tamas K Lengyel
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