Re: [PATCH] General purpose zeroed page slab

Dave Jones
2004-10-14T18:49:15Z

On Thu, Oct 14, 2004 at 06:36:37PM +0100, Matthew Wilcox wrote:
> On Thu, Oct 14, 2004 at 01:30:21PM -0400, Brian Gerst wrote:
> > This doesn't work as you expect it does. The constructor is only called
> > when a new slab is created, for each new object on the slab. It is
> > _not_ run again when an object is freed. So if a page is freed then
> > immediately reallocated it will contain garbage.
>
> The user is responsible for zeroing the page before handing it back to
> the slab allocator.

That sounds like an accident waiting to happen.
How about a CONFIG_DEBUG option to check its zeroed on free ?

Dave