* description of gnttab_max_frames command line option.
@ 2016-01-18 12:53 Ian Campbell
2016-01-18 13:02 ` Jan Beulich
0 siblings, 1 reply; 3+ messages in thread
From: Ian Campbell @ 2016-01-18 12:53 UTC (permalink / raw)
To: xen-devel; +Cc: Jan Beulich, Stefano Stabellini
docs/misc/xen-command-line.markdown says:
### gnttab\_max\_frames
> `= <integer>`
Specify the maximum number of frames per grant table operation.
Is this true? I thought the limit was on the number of pages which the
guest may use as grant table memory, rather than the maximum number of
operations which a single gnttabop is allowed to contain.
Also:
### gnttab\_max\_maptrack\_frames
> `= <integer>`
Specify the maximum number of maptrack frames domain.
I can't parse this one at all. I think it might be trying to say that it
specifies a per-domain maximum to the number of pages used as maptrack
pages?
Ian.
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: description of gnttab_max_frames command line option.
2016-01-18 12:53 description of gnttab_max_frames command line option Ian Campbell
@ 2016-01-18 13:02 ` Jan Beulich
2016-01-18 13:10 ` Ian Campbell
0 siblings, 1 reply; 3+ messages in thread
From: Jan Beulich @ 2016-01-18 13:02 UTC (permalink / raw)
To: Ian Campbell; +Cc: xen-devel, Stefano Stabellini
>>> On 18.01.16 at 13:53, <ian.campbell@citrix.com> wrote:
> docs/misc/xen-command-line.markdown says:
>
> ### gnttab\_max\_frames
> > `= <integer>`
>
> Specify the maximum number of frames per grant table operation.
>
> Is this true? I thought the limit was on the number of pages which the
> guest may use as grant table memory, rather than the maximum number of
> operations which a single gnttabop is allowed to contain.
Indeed the wording looks bogus, not the least because "grant table
operation" can be taken to mean different things. And yes, the
value limits the domain's grant table.
> Also:
>
> ### gnttab\_max\_maptrack\_frames
> > `= <integer>`
>
> Specify the maximum number of maptrack frames domain.
>
> I can't parse this one at all. I think it might be trying to say that it
> specifies a per-domain maximum to the number of pages used as maptrack
> pages?
Yes indeed. Not sure how both of these slipped through.
Jan
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2016-01-18 12:53 description of gnttab_max_frames command line option Ian Campbell
2016-01-18 13:02 ` Jan Beulich
2016-01-18 13:10 ` Ian Campbell
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