lkml.org 
[lkml]   [2008]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC/PATCH 3/3] SLOB: make ksize() more strict for page allocator pass-through
From
Date

On Wed, 2008-05-21 at 21:26 +0300, Pekka J Enberg wrote:
> From: Pekka Enberg <penberg@cs.helsinki.fi>
>
> This patch re-uses the PG_slab flag for marking SLOB bigblock pages so we can
> check that the pointer passed ksize() was really allocated by SLOB.

Ok, first, BUG_ON is wrong.

We already know users (ie nommu memory usage reporting) are abusing this
interface. Making them blow up is unnecessary. Just give them wrong
answers. Issuing a warning might be a good idea for debugging.

Second, I'd prefer to keep this sort of debugging code out of SLOB.
SLUB is much better suited to debugging allocator abuse.

--
Mathematics is the supreme nostalgia of our time.



\
 
 \ /
  Last update: 2008-05-21 21:09    [W:0.575 / U:0.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site