Re: Race between vmtruncate and mapped areas?

Dave McCracken
2003-05-14T19:07:45Z

--On Wednesday, May 14, 2003 15:04:55 -0400 Rik van Riel <riel@redhat.com>
wrote:

>> Not to mention they could end up being outside of any VMA,
>> meaning there's no sane way to deal with them.
>
> I hate to follow up to my own email, but the fact that
> they're not in any VMA could mean we leak these pages
> at exit() time.

Well, they are still inside the vma. Truncate doesn't shrink the vma. It
just generates SIGBUS when the app tries to fault the pages in.

Dave

======================================================================
Dave McCracken IBM Linux Base Kernel Team 1-512-838-3059
dmccr@us.ibm.com T/L 678-3059