Move xen patchset to new version's subdir.

[people/teissler/ipfire-2.x.git] / src / patches / suse-2.6.27.25 / patches.arch / ppc-pseries-migration_hang_fix.patch

diff --git a/src/patches/suse-2.6.27.25/patches.arch/ppc-pseries-migration_hang_fix.patch b/src/patches/suse-2.6.27.25/patches.arch/ppc-pseries-migration_hang_fix.patch
deleted file mode 100644 (file)
index 7a02348..0000000
--- a/src/patches/suse-2.6.27.25/patches.arch/ppc-pseries-migration_hang_fix.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-Subject: Fix partition migration hang under load
-From: Brian King <brking@linux.vnet.ibm.com>
-References: 470563 - LTC51153
-
-While testing partition migration with heavy CPU load using
-shared processors, it was observed that sometimes the migration
-would never complete and would appear to hang. Currently, the
-migration code assumes that if H_SUCCESS is returned from the H_JOIN
-then the migration is complete and the processor is waking up on
-the target system. If there was an outstanding PROD to the processor
-when the H_JOIN is called, however, it will return H_SUCCESS on the source
-system, causing the migration to hang, or in some scenarios cause
-the kernel to crash on the complete call waking the caller
-of rtas_percpu_suspend_me.
-
-Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
-Signed-off-by: Olaf Hering <olh@suse.de>
----
-
- arch/powerpc/kernel/rtas.c |   10 ++++++++--
- 1 file changed, 8 insertions(+), 2 deletions(-)
-
---- a/arch/powerpc/kernel/rtas.c
-+++ b/arch/powerpc/kernel/rtas.c
-@@ -46,6 +46,7 @@ EXPORT_SYMBOL(rtas);
- 
- struct rtas_suspend_me_data {
-       atomic_t working; /* number of cpus accessing this struct */
-+      atomic_t done;
-       int token; /* ibm,suspend-me */
-       int error;
-       struct completion *complete; /* wait on this until working == 0 */
-@@ -663,7 +664,7 @@ static int ibm_suspend_me_token = RTAS_U
- #ifdef CONFIG_PPC_PSERIES
- static void rtas_percpu_suspend_me(void *info)
- {
--      long rc;
-+      long rc = H_SUCCESS;
-       unsigned long msr_save;
-       int cpu;
-       struct rtas_suspend_me_data *data =
-@@ -675,7 +676,8 @@ static void rtas_percpu_suspend_me(void 
-       msr_save = mfmsr();
-       mtmsr(msr_save & ~(MSR_EE));
- 
--      rc = plpar_hcall_norets(H_JOIN);
-+      while (rc == H_SUCCESS && !atomic_read(&data->done))
-+              rc = plpar_hcall_norets(H_JOIN);
- 
-       mtmsr(msr_save);
- 
-@@ -698,6 +700,9 @@ static void rtas_percpu_suspend_me(void 
-                      smp_processor_id(), rc);
-               data->error = rc;
-       }
-+
-+      atomic_set(&data->done, 1);
-+
-       /* This cpu did the suspend or got an error; in either case,
-        * we need to prod all other other cpus out of join state.
-        * Extra prods are harmless.
-@@ -740,6 +745,7 @@ static int rtas_ibm_suspend_me(struct rt
-       }
- 
-       atomic_set(&data.working, 0);
-+      atomic_set(&data.done, 0);
-       data.token = rtas_token("ibm,suspend-me");
-       data.error = 0;
-       data.complete = &done;