From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
LKML <linux-kernel@vger.kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
Anton Blanchard <anton@ozlabs.org>,
"Oliver O'Halloran" <oohall@gmail.com>,
Nathan Lynch <nathanl@linux.ibm.com>,
Michael Neuling <mikey@neuling.org>,
Gautham R Shenoy <ego@linux.vnet.ibm.com>,
Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Valentin Schneider <valentin.schneider@arm.com>,
Jordan Niethe <jniethe5@gmail.com>
Subject: [PATCH v3 08/10] powerpc/smp: Allocate cpumask only after searching thread group
Date: Thu, 23 Jul 2020 14:21:14 +0530 [thread overview]
Message-ID: <20200723085116.4731-9-srikar@linux.vnet.ibm.com> (raw)
In-Reply-To: <20200723085116.4731-1-srikar@linux.vnet.ibm.com>
If allocated earlier and the search fails, then cpumask need to be
freed. However cpu_l1_cache_map can be allocated after we search thread
group.
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Anton Blanchard <anton@ozlabs.org>
Cc: Oliver O'Halloran <oohall@gmail.com>
Cc: Nathan Lynch <nathanl@linux.ibm.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Gautham R Shenoy <ego@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Valentin Schneider <valentin.schneider@arm.com>
Cc: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
---
arch/powerpc/kernel/smp.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index cbca4a8c3314..7d8d44cbab11 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -797,10 +797,6 @@ static int init_cpu_l1_cache_map(int cpu)
if (err)
goto out;
- zalloc_cpumask_var_node(&per_cpu(cpu_l1_cache_map, cpu),
- GFP_KERNEL,
- cpu_to_node(cpu));
-
cpu_group_start = get_cpu_thread_group_start(cpu, &tg);
if (unlikely(cpu_group_start == -1)) {
@@ -809,6 +805,9 @@ static int init_cpu_l1_cache_map(int cpu)
goto out;
}
+ zalloc_cpumask_var_node(&per_cpu(cpu_l1_cache_map, cpu),
+ GFP_KERNEL, cpu_to_node(cpu));
+
for (i = first_thread; i < first_thread + threads_per_core; i++) {
int i_group_start = get_cpu_thread_group_start(i, &tg);
--
2.18.2
next prev parent reply other threads:[~2020-07-23 8:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 8:51 [PATCH v3 00/10] Coregroup support on Powerpc Srikar Dronamraju
2020-07-23 8:51 ` [PATCH v3 01/10] powerpc/smp: Fix a warning under !NEED_MULTIPLE_NODES Srikar Dronamraju
2020-07-23 8:51 ` [PATCH v3 02/10] powerpc/smp: Merge Power9 topology with Power topology Srikar Dronamraju
2020-07-24 7:06 ` Gautham R Shenoy
2020-07-23 8:51 ` [PATCH v3 03/10] powerpc/smp: Move powerpc_topology above Srikar Dronamraju
2020-07-23 8:51 ` [PATCH v3 04/10] powerpc/smp: Move topology fixups into a new function Srikar Dronamraju
2020-07-24 7:08 ` Gautham R Shenoy
2020-07-23 8:51 ` [PATCH v3 05/10] powerpc/smp: Dont assume l2-cache to be superset of sibling Srikar Dronamraju
2020-07-24 7:11 ` Gautham R Shenoy
2020-07-23 8:51 ` [PATCH v3 06/10] powerpc/smp: Generalize 2nd sched domain Srikar Dronamraju
2020-07-23 8:51 ` [PATCH v3 07/10] powerpc/numa: Detect support for coregroup Srikar Dronamraju
2020-07-23 8:51 ` Srikar Dronamraju [this message]
2020-07-23 8:51 ` [PATCH v3 09/10] powerpc/smp: Create coregroup domain Srikar Dronamraju
2020-07-27 4:39 ` Gautham R Shenoy
2020-07-27 11:18 ` Srikar Dronamraju
2020-07-23 8:51 ` [PATCH v3 10/10] powerpc/smp: Implement cpu_to_coregroup_id Srikar Dronamraju
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