Significant memory leak in 9.3p10?

[jd1008]

On 03/26/2015 05:47 PM, J David wrote:
> In our case,
>
> On Thu, Mar 26, 2015 at 5:03 PM, Kevin Oberman <rkoberman at gmail.com> wrote:
>> This is just a shot in the dark and not a really likely one, but I have had
>> issues with Firefox leaking memory badly. I can free the space by killing
>> firefox and restarting it.
> In our case, we can log in from the console, kill every single
> user-mode process on the system except the init, login, and the
> console shell, and the memory is not recovered.  Gigabytes and
> gigabytes user memory of it are being held by some un-findable
> anonymous persistent structure not linked to any process.  Konstantin
> proposed that it was some sort of shared memory usage, but there
> appears to be no way to check or investigate most types of shared
> memory usage on FreeBSD.
>
>> If it is in user space, top should show it under RES.
> This is definitely *not* the case.  Whatever is using the memory is
> not associated with any user-space process, and does not show up on
> top or ps.
>
> It also does not appear to be SysV shared memory, as that reports:
>
> $ ipcs -m
>
> Shared Memory:
>
> T           ID          KEY MODE        OWNER    GROUP
>
>
> $
>
>
> Also, kern.ipc.shmmax is only 512MB whereas this problem is consuming
> usually 8-10GB.  So I guess the remaining possibilities are anonymous
> mmap's that are somehow not associated with any process and Posix
> shared memory.  Are there any ways to investigate either possibility?
>
> Thanks!
> __________________
I was wondering if those pages might be held in the
filesystem page cache??? Just a wild guess.