From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> To: linux-kernel@vger.kernel.org Cc: rt@linutronix.de, tglx@linutronix.de, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Seth Jennings <sjenning@redhat.com>, linux-mm@kvack.org Subject: [PATCH 11/22] mm/zswap: Convert dst-mem to hotplug state machine Date: Sun, 27 Nov 2016 00:13:39 +0100 [thread overview] Message-ID: <20161126231350.10321-12-bigeasy@linutronix.de> (raw) In-Reply-To: <20161126231350.10321-1-bigeasy@linutronix.de> Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Cc: Seth Jennings <sjenning@redhat.com> Cc: linux-mm@kvack.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- include/linux/cpuhotplug.h | 1 + mm/zswap.c | 75 +++++++++++----------------------------------- 2 files changed, 19 insertions(+), 57 deletions(-) diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 9f29dd996088..62f51a4e8676 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -65,6 +65,7 @@ enum cpuhp_state { CPUHP_ARM_BL_PREPARE, CPUHP_TRACE_RB_PREPARE, CPUHP_MM_ZS_PREPARE, + CPUHP_MM_ZSWP_MEM_PREPARE, CPUHP_TIMERS_DEAD, CPUHP_NOTF_ERR_INJ_PREPARE, CPUHP_MIPS_SOC_PREPARE, diff --git a/mm/zswap.c b/mm/zswap.c index 275b22cc8df4..b13aa5706348 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -352,70 +352,28 @@ static struct zswap_entry *zswap_entry_find_get(struct rb_root *root, **********************************/ static DEFINE_PER_CPU(u8 *, zswap_dstmem); -static int __zswap_cpu_dstmem_notifier(unsigned long action, unsigned long cpu) +static int zswap_dstmem_prepare(unsigned int cpu) { u8 *dst; - switch (action) { - case CPU_UP_PREPARE: - dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu)); - if (!dst) { - pr_err("can't allocate compressor buffer\n"); - return NOTIFY_BAD; - } - per_cpu(zswap_dstmem, cpu) = dst; - break; - case CPU_DEAD: - case CPU_UP_CANCELED: - dst = per_cpu(zswap_dstmem, cpu); - kfree(dst); - per_cpu(zswap_dstmem, cpu) = NULL; - break; - default: - break; + dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu)); + if (!dst) { + pr_err("can't allocate compressor buffer\n"); + return -ENOMEM; } - return NOTIFY_OK; -} - -static int zswap_cpu_dstmem_notifier(struct notifier_block *nb, - unsigned long action, void *pcpu) -{ - return __zswap_cpu_dstmem_notifier(action, (unsigned long)pcpu); -} - -static struct notifier_block zswap_dstmem_notifier = { - .notifier_call = zswap_cpu_dstmem_notifier, -}; - -static int __init zswap_cpu_dstmem_init(void) -{ - unsigned long cpu; - - cpu_notifier_register_begin(); - for_each_online_cpu(cpu) - if (__zswap_cpu_dstmem_notifier(CPU_UP_PREPARE, cpu) == - NOTIFY_BAD) - goto cleanup; - __register_cpu_notifier(&zswap_dstmem_notifier); - cpu_notifier_register_done(); + per_cpu(zswap_dstmem, cpu) = dst; return 0; - -cleanup: - for_each_online_cpu(cpu) - __zswap_cpu_dstmem_notifier(CPU_UP_CANCELED, cpu); - cpu_notifier_register_done(); - return -ENOMEM; } -static void zswap_cpu_dstmem_destroy(void) +static int zswap_dstmem_dead(unsigned int cpu) { - unsigned long cpu; + u8 *dst; - cpu_notifier_register_begin(); - for_each_online_cpu(cpu) - __zswap_cpu_dstmem_notifier(CPU_UP_CANCELED, cpu); - __unregister_cpu_notifier(&zswap_dstmem_notifier); - cpu_notifier_register_done(); + dst = per_cpu(zswap_dstmem, cpu); + kfree(dst); + per_cpu(zswap_dstmem, cpu) = NULL; + + return 0; } static int __zswap_cpu_comp_notifier(struct zswap_pool *pool, @@ -1238,6 +1196,7 @@ static void __exit zswap_debugfs_exit(void) { } static int __init init_zswap(void) { struct zswap_pool *pool; + int ret; zswap_init_started = true; @@ -1246,7 +1205,9 @@ static int __init init_zswap(void) goto cache_fail; } - if (zswap_cpu_dstmem_init()) { + ret = cpuhp_setup_state(CPUHP_MM_ZSWP_MEM_PREPARE, "mm/zswap:prepare", + zswap_dstmem_prepare, zswap_dstmem_dead); + if (ret) { pr_err("dstmem alloc failed\n"); goto dstmem_fail; } @@ -1267,7 +1228,7 @@ static int __init init_zswap(void) return 0; pool_fail: - zswap_cpu_dstmem_destroy(); + cpuhp_remove_state(CPUHP_MM_ZSWP_MEM_PREPARE); dstmem_fail: zswap_entry_cache_destroy(); cache_fail: -- 2.10.2
WARNING: multiple messages have this Message-ID (diff)
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> To: linux-kernel@vger.kernel.org Cc: rt@linutronix.de, tglx@linutronix.de, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Seth Jennings <sjenning@redhat.com>, linux-mm@kvack.org Subject: [PATCH 11/22] mm/zswap: Convert dst-mem to hotplug state machine Date: Sun, 27 Nov 2016 00:13:39 +0100 [thread overview] Message-ID: <20161126231350.10321-12-bigeasy@linutronix.de> (raw) In-Reply-To: <20161126231350.10321-1-bigeasy@linutronix.de> Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Cc: Seth Jennings <sjenning@redhat.com> Cc: linux-mm@kvack.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- include/linux/cpuhotplug.h | 1 + mm/zswap.c | 75 +++++++++++----------------------------------- 2 files changed, 19 insertions(+), 57 deletions(-) diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 9f29dd996088..62f51a4e8676 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -65,6 +65,7 @@ enum cpuhp_state { CPUHP_ARM_BL_PREPARE, CPUHP_TRACE_RB_PREPARE, CPUHP_MM_ZS_PREPARE, + CPUHP_MM_ZSWP_MEM_PREPARE, CPUHP_TIMERS_DEAD, CPUHP_NOTF_ERR_INJ_PREPARE, CPUHP_MIPS_SOC_PREPARE, diff --git a/mm/zswap.c b/mm/zswap.c index 275b22cc8df4..b13aa5706348 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -352,70 +352,28 @@ static struct zswap_entry *zswap_entry_find_get(struct rb_root *root, **********************************/ static DEFINE_PER_CPU(u8 *, zswap_dstmem); -static int __zswap_cpu_dstmem_notifier(unsigned long action, unsigned long cpu) +static int zswap_dstmem_prepare(unsigned int cpu) { u8 *dst; - switch (action) { - case CPU_UP_PREPARE: - dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu)); - if (!dst) { - pr_err("can't allocate compressor buffer\n"); - return NOTIFY_BAD; - } - per_cpu(zswap_dstmem, cpu) = dst; - break; - case CPU_DEAD: - case CPU_UP_CANCELED: - dst = per_cpu(zswap_dstmem, cpu); - kfree(dst); - per_cpu(zswap_dstmem, cpu) = NULL; - break; - default: - break; + dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu)); + if (!dst) { + pr_err("can't allocate compressor buffer\n"); + return -ENOMEM; } - return NOTIFY_OK; -} - -static int zswap_cpu_dstmem_notifier(struct notifier_block *nb, - unsigned long action, void *pcpu) -{ - return __zswap_cpu_dstmem_notifier(action, (unsigned long)pcpu); -} - -static struct notifier_block zswap_dstmem_notifier = { - .notifier_call = zswap_cpu_dstmem_notifier, -}; - -static int __init zswap_cpu_dstmem_init(void) -{ - unsigned long cpu; - - cpu_notifier_register_begin(); - for_each_online_cpu(cpu) - if (__zswap_cpu_dstmem_notifier(CPU_UP_PREPARE, cpu) == - NOTIFY_BAD) - goto cleanup; - __register_cpu_notifier(&zswap_dstmem_notifier); - cpu_notifier_register_done(); + per_cpu(zswap_dstmem, cpu) = dst; return 0; - -cleanup: - for_each_online_cpu(cpu) - __zswap_cpu_dstmem_notifier(CPU_UP_CANCELED, cpu); - cpu_notifier_register_done(); - return -ENOMEM; } -static void zswap_cpu_dstmem_destroy(void) +static int zswap_dstmem_dead(unsigned int cpu) { - unsigned long cpu; + u8 *dst; - cpu_notifier_register_begin(); - for_each_online_cpu(cpu) - __zswap_cpu_dstmem_notifier(CPU_UP_CANCELED, cpu); - __unregister_cpu_notifier(&zswap_dstmem_notifier); - cpu_notifier_register_done(); + dst = per_cpu(zswap_dstmem, cpu); + kfree(dst); + per_cpu(zswap_dstmem, cpu) = NULL; + + return 0; } static int __zswap_cpu_comp_notifier(struct zswap_pool *pool, @@ -1238,6 +1196,7 @@ static void __exit zswap_debugfs_exit(void) { } static int __init init_zswap(void) { struct zswap_pool *pool; + int ret; zswap_init_started = true; @@ -1246,7 +1205,9 @@ static int __init init_zswap(void) goto cache_fail; } - if (zswap_cpu_dstmem_init()) { + ret = cpuhp_setup_state(CPUHP_MM_ZSWP_MEM_PREPARE, "mm/zswap:prepare", + zswap_dstmem_prepare, zswap_dstmem_dead); + if (ret) { pr_err("dstmem alloc failed\n"); goto dstmem_fail; } @@ -1267,7 +1228,7 @@ static int __init init_zswap(void) return 0; pool_fail: - zswap_cpu_dstmem_destroy(); + cpuhp_remove_state(CPUHP_MM_ZSWP_MEM_PREPARE); dstmem_fail: zswap_entry_cache_destroy(); cache_fail: -- 2.10.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2016-11-26 23:17 UTC|newest] Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-11-26 23:13 cpu hotplug: convert more drivers (batch #6 and last) Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 01/22] cpufreq/acpi-cpufreq: Convert to hotplug state machine Sebastian Andrzej Siewior 2016-11-28 5:15 ` Viresh Kumar 2016-11-28 9:49 ` Sebastian Andrzej Siewior 2016-11-28 9:51 ` [PATCH 01/22 v2] " Sebastian Andrzej Siewior 2016-11-28 9:54 ` Viresh Kumar 2016-11-28 12:46 ` Rafael J. Wysocki 2016-11-26 23:13 ` [PATCH 02/22] cpufreq/acpi-cpufreq: drop rdmsr_on_cpus() usage Sebastian Andrzej Siewior 2016-11-28 9:52 ` [PATCH 02/22 v2] " Sebastian Andrzej Siewior 2016-11-28 9:54 ` Viresh Kumar 2016-11-26 23:13 ` [PATCH 03/22] idle/intel: Remove superfluous SMP fuction call Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 04/22] idle/intel: Convert to hotplug state machine Sebastian Andrzej Siewior 2016-11-28 17:29 ` Thomas Gleixner 2016-11-29 9:40 ` Sebastian Andrzej Siewior 2016-11-29 9:51 ` [PATCH 04/22 v2] " Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 05/22] oprofile/nmi timer: " Sebastian Andrzej Siewior 2016-12-02 0:09 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 06/22] tracing/rb: " Sebastian Andrzej Siewior 2016-12-02 0:10 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-12-07 11:15 ` [linux-next] tracing/rb: NULL pointer dereference at trace_rb_cpu_prepare() Tetsuo Handa 2016-12-07 13:31 ` [PATCH] tracing/rb: init the CPU mask on allocation Sebastian Andrzej Siewior 2016-12-07 13:43 ` [tip:smp/hotplug] tracing/rb: Init " tip-bot for Sebastian Andrzej Siewior 2016-12-07 14:33 ` [PATCH] tracing/rb: init " Tetsuo Handa 2016-11-26 23:13 ` [PATCH 07/22] mm/vmstat: Drop get_online_cpus() from init_cpu_node_state/vmstat_cpu_dead() Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-11-28 9:24 ` Michal Hocko 2016-11-28 9:24 ` Michal Hocko 2016-12-02 0:10 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 08/22] mm/vmstat: Avoid on each online CPU loops Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-11-28 9:28 ` Michal Hocko 2016-11-28 9:28 ` Michal Hocko 2016-11-29 14:08 ` Thomas Gleixner 2016-11-29 14:08 ` Thomas Gleixner 2016-11-29 14:44 ` Michal Hocko 2016-11-29 14:44 ` Michal Hocko 2016-11-29 14:51 ` [PATCH 08/22 v2] " Sebastian Andrzej Siewior 2016-11-29 14:51 ` Sebastian Andrzej Siewior 2016-11-29 15:20 ` Michal Hocko 2016-11-29 15:20 ` Michal Hocko 2016-12-02 0:11 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 09/22] mm/vmstat: Convert to hotplug state machine Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-11-29 14:52 ` [PATCH 09/22 v2] " Sebastian Andrzej Siewior 2016-11-29 14:52 ` Sebastian Andrzej Siewior 2016-12-02 0:11 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 10/22] mm/zsmalloc: " Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-12-02 0:12 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior [this message] 2016-11-26 23:13 ` [PATCH 11/22] mm/zswap: Convert dst-mem " Sebastian Andrzej Siewior 2016-12-02 0:12 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 12/22] mm/zswap: Convert pool " Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-12-02 0:13 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 13/22] iommu/vt-d: Convert " Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-12-02 0:13 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner 2016-11-26 23:13 ` [PATCH 14/22] mm/compaction: " Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-12-02 0:14 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner 2016-11-26 23:13 ` [PATCH 15/22] arm64/cpuinfo: Make hotplug notifier symmetric Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-11-29 17:22 ` Suzuki K Poulose 2016-11-29 17:22 ` Suzuki K Poulose 2016-12-02 0:14 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner 2016-11-26 23:13 ` [PATCH 16/22] arm64/cpuinfo: Convert to hotplug state machine Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-11-29 17:26 ` Suzuki K Poulose 2016-11-29 17:26 ` Suzuki K Poulose 2016-12-02 0:15 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner 2016-11-26 23:13 ` [PATCH 17/22] KVM/PPC/Book3S HV: " Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-11-26 23:13 ` Sebastian Andrzej Siewior 2016-12-02 0:15 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner 2016-11-26 23:13 ` [PATCH 18/22] zram: " Sebastian Andrzej Siewior 2016-12-02 0:16 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner 2016-11-26 23:13 ` [PATCH 19/22] soc/fsl/qbman: " Sebastian Andrzej Siewior 2016-12-02 0:16 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 20/22] " Sebastian Andrzej Siewior 2016-12-02 0:17 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 21/22] staging/lustre/libcfs: " Sebastian Andrzej Siewior 2016-11-26 23:14 ` [lustre-devel] " Sebastian Andrzej Siewior 2016-12-02 10:18 ` [PATCH 21/22 v2] " Sebastian Andrzej Siewior 2016-12-02 10:18 ` [lustre-devel] " Sebastian Andrzej Siewior 2016-12-02 10:42 ` Greg Kroah-Hartman 2016-12-02 10:42 ` [lustre-devel] " Greg Kroah-Hartman 2016-12-02 11:00 ` [PATCH 21/22 v3] " Sebastian Andrzej Siewior 2016-12-02 11:00 ` [lustre-devel] " Sebastian Andrzej Siewior 2016-11-26 23:13 ` [PATCH 22/22] Remove obsolete cpu hotplug register / unregister functions Sebastian Andrzej Siewior 2016-12-21 19:19 [patch 00/10] cpu/hotplug: Final cleanup Thomas Gleixner 2016-12-21 19:19 ` [patch 01/10] ARM: imx: mmcd: Fix broken cpu hotplug handling Thomas Gleixner 2016-12-22 20:18 ` [tip:smp/urgent] ARM/imx/mmcd: " tip-bot for Thomas Gleixner 2016-12-25 10:02 ` tip-bot for Thomas Gleixner 2016-12-21 19:19 ` [patch 02/10] cpu/hotplug: Prevent overwriting of callbacks Thomas Gleixner 2016-12-22 11:07 ` Thomas Gleixner 2016-12-26 23:04 ` ojab 2016-12-26 23:12 ` ojab 2016-12-22 20:21 ` [tip:smp/urgent] " tip-bot for Thomas Gleixner 2016-12-25 10:04 ` tip-bot for Thomas Gleixner 2016-12-21 19:19 ` [patch 03/10] scsi/bnx2fc: Convert to hotplug state machine Thomas Gleixner 2016-12-22 20:21 ` [tip:smp/urgent] " tip-bot for Sebastian Andrzej Siewior 2016-12-25 10:05 ` tip-bot for Sebastian Andrzej Siewior 2016-12-21 19:19 ` [patch 04/10] scsi/bnx2i: " Thomas Gleixner 2016-12-22 20:22 ` [tip:smp/urgent] " tip-bot for Sebastian Andrzej Siewior 2016-12-25 10:05 ` tip-bot for Sebastian Andrzej Siewior 2016-12-21 19:19 ` [patch 05/10] staging/lustre/libcfs: " Thomas Gleixner 2016-12-21 19:29 ` [lustre-devel] " Thomas Gleixner 2016-12-22 20:22 ` [tip:smp/urgent] " tip-bot for Anna-Maria Gleixner 2016-12-25 10:06 ` tip-bot for Anna-Maria Gleixner 2016-12-21 19:19 ` [patch 06/10] cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions Thomas Gleixner 2016-12-22 20:23 ` [tip:smp/urgent] " tip-bot for Thomas Gleixner 2016-12-25 10:06 ` tip-bot for Thomas Gleixner 2016-12-21 19:19 ` [patch 07/10] cpu/hotplug: Cleanup state names Thomas Gleixner 2016-12-22 20:23 ` [tip:smp/urgent] " tip-bot for Thomas Gleixner 2016-12-25 10:07 ` tip-bot for Thomas Gleixner 2016-12-21 19:19 ` [patch 08/10] coresight: etm3/4x: Consolidate hotplug state space Thomas Gleixner 2016-12-22 16:30 ` Mathieu Poirier 2016-12-22 20:24 ` [tip:smp/urgent] coresight/etm3/4x: " tip-bot for Thomas Gleixner 2016-12-25 10:07 ` tip-bot for Thomas Gleixner 2016-12-21 19:19 ` [patch 09/10] irqchip/gic: " Thomas Gleixner 2016-12-22 20:24 ` [tip:smp/urgent] " tip-bot for Thomas Gleixner 2016-12-25 10:08 ` tip-bot for Thomas Gleixner 2016-12-21 19:19 ` [patch 10/10] irqchip/armada-xp: " Thomas Gleixner 2016-12-21 20:22 ` Thomas Petazzoni 2016-12-21 20:27 ` Thomas Gleixner 2016-12-22 20:25 ` [tip:smp/urgent] " tip-bot for Thomas Gleixner 2016-12-25 10:08 ` tip-bot for Thomas Gleixner 2016-12-22 17:59 ` [patch 00/10] cpu/hotplug: Final cleanup Sam Ravnborg 2016-12-27 11:17 ` Thomas Gleixner 2016-12-27 19:41 ` Sam Ravnborg
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