[FE training-materials-updates] Kernel slides: correction about the kmalloc allocator

[Michael Opdenacker]

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=78e3397248a408976e642b003d449bcb3f18e659

>---------------------------------------------------------------

commit 78e3397248a408976e642b003d449bcb3f18e659
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Sat Feb 1 15:34:05 2014 +0100

    Kernel slides: correction about the kmalloc allocator
    
    - The slab caches do not always have a power of two size
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


>---------------------------------------------------------------

78e3397248a408976e642b003d449bcb3f18e659
 .../kernel-driver-development-memory.tex           |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex b/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex
index 0135744..425c0ee 100644
--- a/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex
+++ b/slides/kernel-driver-development-memory/kernel-driver-development-memory.tex
@@ -278,9 +278,10 @@
     \code{kmalloc-XXX} in \code{/proc/slabinfo}
   \item For larger sizes, it relies on the page allocator
   \item The allocated area is guaranteed to be physically contiguous
-  \item The allocated area size is rounded up to the next power of two
-    size (while using the SLAB allocator directly allows to have more
-    flexibility)
+  \item The allocated area size is rounded up to the size of the
+        smallest SLAB cache in which it can fit 
+        (while using the SLAB allocator directly allows to have more
+        flexibility)
   \item It uses the same flags as the page allocator (\ksym{GFP_KERNEL},
     \ksym{GFP_ATOMIC}, \ksym{GFP_DMA}, etc.) with the same semantics.
   \item Maximum sizes, on \code{x86} and \code{arm} (see