svn commit: r230623 - in head/sys: amd64/amd64 cddl/compat/opensolaris/sys cddl/contrib/opensolaris/uts/common/fs/zfs sys vm

[K Macy]

Il giorno 28/gen/2012, alle ore 09:39, Pawel Jakub Dawidek <pjd at FreeBSD.org> ha scritto:

> On Fri, Jan 27, 2012 at 08:18:32PM +0000, Kip Macy wrote:
>> Author: kmacy
>> Date: Fri Jan 27 20:18:31 2012
>> New Revision: 230623
>> URL: http://svn.freebsd.org/changeset/base/230623
>> 
>> Log:
>>  exclude kmem_alloc'ed ARC data buffers from kernel minidumps on amd64
>>  excluding other allocations including UMA now entails the addition of
>>  a single flag to kmem_alloc or uma zone create
> 
> How do you handle the case when there are two small allocations within
> one page, where one has the NODUMP flag and one doesn't have the flag?

Kmem_alloc and zone creation both work at granularities greater than or equal to a page. The per-page management of dump is why this flag is not available to generic malloc.
> 
> As for GELI and opencrypto what I'd love to have is a flag that will
> prevent dumping the memory and that will clear memory on free. How hard
> would that be?
> 

I'll look into it. Off-hand I think it would be easy enough.

Cheers, 
Kip
> -- 
> Pawel Jakub Dawidek                       http://www.wheelsystems.com
> FreeBSD committer                         http://www.FreeBSD.org
> Am I Evil? Yes, I Am!                     http://tupytaj.pl