Re: remap_file_pages() use

[Dave Hansen]

On 05/19/2014 09:42 AM, Armin Rigo wrote:
> If there is an official way to know in advance how many remappings our
> process is allowed to perform, then we could adapt as the size
> increases.  Or maybe catching ENOMEM and doubling the remapping size
> (in some process-wide synchronization point).  All in all, thanks for
> the note: it looks like there are solutions (even if less elegant than
> remap_file_pages from the user's perspective).

We keep the current count as mm->map_count in the kernel, and the limit
is available because it's a sysctl.  It wouldn't be hard to dump
mm->map_count out in a /proc file somewhere if it would be useful to
you.  Would that work, or is there some other interface that would be
more convenient?
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