Re: [PATCH] General purpose zeroed page slab

From: Dave Jones <>
Date: 2004-10-15 04:49:15
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 ?


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Received on Thu Oct 14 16:31:06 2004

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