Disable threading on compression/decompression for hibernate

disable-threading-in-compression-for-hibernate.patch

@@ -0,0 +1,17 @@
+In attempt to find the cause of some of the hibernate issues we are seeing,
+turn off threading for compression.
+
+Signed-off-by: Justin M. Forbes <jforbes@redhat.com>
+
+diff -ruNp a/kernel/power/swap.c b/kernel/power/swap.c
+--- a/kernel/power/swap.c	2012-03-02 13:52:27.777485028 -0600
++++ b/kernel/power/swap.c	2012-03-02 14:05:20.168115129 -0600
+@@ -401,7 +401,7 @@ static int swap_writer_finish(struct swa
+ #define LZO_CMP_SIZE	(LZO_CMP_PAGES * PAGE_SIZE)
+ 
+ /* Maximum number of threads for compression/decompression. */
+-#define LZO_THREADS	3
++#define LZO_THREADS	1
+ 
+ /* Maximum number of pages for read buffering. */
+ #define LZO_READ_PAGES	(MAP_PAGE_ENTRIES * 8)

kernel.spec

@@ -781,6 +781,9 @@ Patch21301: cifs-fix-dentry-refcount-leak-when-opening-a-FIFO.patch
 #rhbz 728478
 Patch21302: sony-laptop-Enable-keyboard-backlight-by-default.patch
 
+# Disable threading in hibernate compression
+Patch21303: disable-threading-in-compression-for-hibernate.patch
+
 Patch21400: unhandled-irqs-switch-to-polling.patch
 
 # compat-wireless patches
@@ -1509,6 +1512,9 @@ ApplyPatch cifs-fix-dentry-refcount-leak-when-opening-a-FIFO.patch
 #rhbz 728478
 ApplyPatch sony-laptop-Enable-keyboard-backlight-by-default.patch
 
+#Disable threading in hibernate compression
+ApplyPatch disable-threading-in-compression-for-hibernate.patch
+
 ApplyPatch unhandled-irqs-switch-to-polling.patch
 
 # END OF PATCH APPLICATIONS
@@ -2382,6 +2388,9 @@ fi
 #                 ||----w |
 #                 ||     ||
 %changelog
+* Fri Mar 02 2012 Justin M. Forbes <jforbes@redhat.com> 
+- Disable threading in hibernate compression/decompression
+
 * Fri Mar 02 2012 Adam Jackson <ajax@redhat.com>
 - drm-intel-crtc-dpms-fix.patch: Fix system hang on gen2 kit on DPMS (#730853)