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From:   David Howells <dhowells@redhat.com>
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To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     dhowells@redhat.com, Joe Perches <joe@perches.com>,
        Waiman Long <longman@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
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Subject: Re: [PATCH] mm: Add kvfree_sensitive() for freeing sensitive data objects
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Date:   Mon, 06 Apr 2020 18:51:37 +0100
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Linus Torvalds <torvalds@linux-foundation.org> wrote:

> > Add yet another alloc flag like __GFP_SENSITIVE
> > and have kfree operate on that and not have a
> > kfree_sensitive at all.
> 
> That sounds potentially sensible. Maybe even a SLAB_SENSITIVE to mark
> a whole slab cache sensitive for kmem_cache_create().

The allocation might be by vmalloc rather than kmalloc.  I'm not sure if that
makes things more difficult.

David