[PATCH v2] libsas: export sas_alloc_task()

[PATCH v2] libsas: export sas_alloc_task()

[Dan Williams]

Before isci adds a 3rd open coded user of this functionality just share
the libsas version.

Cc: Jack Wang <jack_wang@usish.com>
Cc: Lindar Liu <lindar_liu@usish.com>
Cc: Xiangliang Yu <yuxiangl@marvell.com>
Cc: Ankit Jain <jankit@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
v2:
* use KMEM_CACHE as noted by Ankit
* remove redundant checking for NULL tasks as sas_free_tasks() checks
  for NULL

 drivers/scsi/libsas/sas_init.c   |   30 +++++++++++++++++++++++++++---
 drivers/scsi/mvsas/mv_sas.c      |   29 +++--------------------------
 drivers/scsi/pm8001/pm8001_sas.c |   38 ++++++--------------------------------
 include/scsi/libsas.h            |   26 ++------------------------
 4 files changed, 38 insertions(+), 85 deletions(-)

diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 2dc5534..dd56ea8 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -37,7 +37,32 @@
 
 #include "../scsi_sas_internal.h"
 
-struct kmem_cache *sas_task_cache;
+static struct kmem_cache *sas_task_cache;
+
+struct sas_task *sas_alloc_task(gfp_t flags)
+{
+	struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
+
+	if (task) {
+		INIT_LIST_HEAD(&task->list);
+		spin_lock_init(&task->task_state_lock);
+		task->task_state_flags = SAS_TASK_STATE_PENDING;
+		init_timer(&task->timer);
+		init_completion(&task->completion);
+	}
+
+	return task;
+}
+EXPORT_SYMBOL_GPL(sas_alloc_task);
+
+void sas_free_task(struct sas_task *task)
+{
+	if (task) {
+		BUG_ON(!list_empty(&task->list));
+		kmem_cache_free(sas_task_cache, task);
+	}
+}
+EXPORT_SYMBOL_GPL(sas_free_task);
 
 /*------------ SAS addr hash -----------*/
 void sas_hash_addr(u8 *hashed, const u8 *sas_addr)
@@ -293,8 +318,7 @@ EXPORT_SYMBOL_GPL(sas_domain_release_transport);
 
 static int __init sas_class_init(void)
 {
-	sas_task_cache = kmem_cache_create("sas_task", sizeof(struct sas_task),
-					   0, SLAB_HWCACHE_ALIGN, NULL);
+	sas_task_cache = KMEM_CACHE(sas_task, SLAB_HWCACHE_ALIGN);
 	if (!sas_task_cache)
 		return -ENOMEM;
 
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 0ef2742..7921b61 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -1518,28 +1518,6 @@ void mvs_dev_gone(struct domain_device *dev)
 	mvs_dev_gone_notify(dev);
 }
 
-static  struct sas_task *mvs_alloc_task(void)
-{
-	struct sas_task *task = kzalloc(sizeof(struct sas_task), GFP_KERNEL);
-
-	if (task) {
-		INIT_LIST_HEAD(&task->list);
-		spin_lock_init(&task->task_state_lock);
-		task->task_state_flags = SAS_TASK_STATE_PENDING;
-		init_timer(&task->timer);
-		init_completion(&task->completion);
-	}
-	return task;
-}
-
-static  void mvs_free_task(struct sas_task *task)
-{
-	if (task) {
-		BUG_ON(!list_empty(&task->list));
-		kfree(task);
-	}
-}
-
 static void mvs_task_done(struct sas_task *task)
 {
 	if (!del_timer(&task->timer))
@@ -1564,7 +1542,7 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev,
 	struct sas_task *task = NULL;
 
 	for (retry = 0; retry < 3; retry++) {
-		task = mvs_alloc_task();
+		task = sas_alloc_task(GFP_KERNEL);
 		if (!task)
 			return -ENOMEM;
 
@@ -1622,15 +1600,14 @@ static int mvs_exec_internal_tmf_task(struct domain_device *dev,
 				    SAS_ADDR(dev->sas_addr),
 				    task->task_status.resp,
 				    task->task_status.stat);
-			mvs_free_task(task);
+			sas_free_task(task);
 			task = NULL;
 
 		}
 	}
 ex_err:
 	BUG_ON(retry == 3 && task != NULL);
-	if (task != NULL)
-		mvs_free_task(task);
+	sas_free_task(task);
 	return res;
 }
 
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 6ae059e..7dbbf8b 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -669,30 +669,6 @@ int pm8001_dev_found(struct domain_device *dev)
 	return pm8001_dev_found_notify(dev);
 }
 
-/**
-  * pm8001_alloc_task - allocate a task structure for TMF
-  */
-static struct sas_task *pm8001_alloc_task(void)
-{
-	struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL);
-	if (task) {
-		INIT_LIST_HEAD(&task->list);
-		spin_lock_init(&task->task_state_lock);
-		task->task_state_flags = SAS_TASK_STATE_PENDING;
-		init_timer(&task->timer);
-		init_completion(&task->completion);
-	}
-	return task;
-}
-
-static void pm8001_free_task(struct sas_task *task)
-{
-	if (task) {
-		BUG_ON(!list_empty(&task->list));
-		kfree(task);
-	}
-}
-
 static void pm8001_task_done(struct sas_task *task)
 {
 	if (!del_timer(&task->timer))
@@ -728,7 +704,7 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 	struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
 
 	for (retry = 0; retry < 3; retry++) {
-		task = pm8001_alloc_task();
+		task = sas_alloc_task(GFP_KERNEL);
 		if (!task)
 			return -ENOMEM;
 
@@ -789,14 +765,13 @@ static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
 				SAS_ADDR(dev->sas_addr),
 				task->task_status.resp,
 				task->task_status.stat));
-			pm8001_free_task(task);
+			sas_free_task(task);
 			task = NULL;
 		}
 	}
 ex_err:
 	BUG_ON(retry == 3 && task != NULL);
-	if (task != NULL)
-		pm8001_free_task(task);
+	sas_free_task(task);
 	return res;
 }
 
@@ -811,7 +786,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 	struct sas_task *task = NULL;
 
 	for (retry = 0; retry < 3; retry++) {
-		task = pm8001_alloc_task();
+		task = sas_alloc_task(GFP_KERNEL);
 		if (!task)
 			return -ENOMEM;
 
@@ -864,14 +839,13 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 				SAS_ADDR(dev->sas_addr),
 				task->task_status.resp,
 				task->task_status.stat));
-			pm8001_free_task(task);
+			sas_free_task(task);
 			task = NULL;
 		}
 	}
 ex_err:
 	BUG_ON(retry == 3 && task != NULL);
-	if (task != NULL)
-		pm8001_free_task(task);
+	sas_free_task(task);
 	return res;
 }
 
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index ee86606..2517254 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -555,36 +555,14 @@ struct sas_task {
 	struct work_struct abort_work;
 };
 
-extern struct kmem_cache *sas_task_cache;
-
 #define SAS_TASK_STATE_PENDING      1
 #define SAS_TASK_STATE_DONE         2
 #define SAS_TASK_STATE_ABORTED      4
 #define SAS_TASK_NEED_DEV_RESET     8
 #define SAS_TASK_AT_INITIATOR       16
 
-static inline struct sas_task *sas_alloc_task(gfp_t flags)
-{
-	struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
-
-	if (task) {
-		INIT_LIST_HEAD(&task->list);
-		spin_lock_init(&task->task_state_lock);
-		task->task_state_flags = SAS_TASK_STATE_PENDING;
-		init_timer(&task->timer);
-		init_completion(&task->completion);
-	}
-
-	return task;
-}
-
-static inline void sas_free_task(struct sas_task *task)
-{
-	if (task) {
-		BUG_ON(!list_empty(&task->list));
-		kmem_cache_free(sas_task_cache, task);
-	}
-}
+extern struct sas_task *sas_alloc_task(gfp_t flags);
+extern void sas_free_task(struct sas_task *task);
 
 struct sas_domain_function_template {
 	/* The class calls these to notify the LLDD of an event. */

RE: [PATCH v2] libsas: export sas_alloc_task()

[Jack Wang]

Acked-by: Jack Wang <jack_wang@usish.com>

Thanks

> Cc: Jack Wang <jack_wang@usish.com>
> Cc: Lindar Liu <lindar_liu@usish.com>
> Cc: Xiangliang Yu <yuxiangl@marvell.com>
> Cc: Ankit Jain <jankit@suse.de>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
> ---
> v2:
> * use KMEM_CACHE as noted by Ankit
> * remove redundant checking for NULL tasks as sas_free_tasks() checks
>   for NULL
> 
>  drivers/scsi/libsas/sas_init.c   |   30 +++++++++++++++++++++++++++---
>  drivers/scsi/mvsas/mv_sas.c      |   29 +++--------------------------
>  drivers/scsi/pm8001/pm8001_sas.c |   38
> ++++++--------------------------------
>  include/scsi/libsas.h            |   26 ++------------------------
>  4 files changed, 38 insertions(+), 85 deletions(-)
> 
> diff --git a/drivers/scsi/libsas/sas_init.c
> b/drivers/scsi/libsas/sas_init.c
> index 2dc5534..dd56ea8 100644
> --- a/drivers/scsi/libsas/sas_init.c
> +++ b/drivers/scsi/libsas/sas_init.c
> @@ -37,7 +37,32 @@
> 
>  #include "../scsi_sas_internal.h"
> 
> -struct kmem_cache *sas_task_cache;
> +static struct kmem_cache *sas_task_cache;
> +
> +struct sas_task *sas_alloc_task(gfp_t flags)
> +{
> +	struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
> +
> +	if (task) {
> +		INIT_LIST_HEAD(&task->list);
> +		spin_lock_init(&task->task_state_lock);
> +		task->task_state_flags = SAS_TASK_STATE_PENDING;
> +		init_timer(&task->timer);
> +		init_completion(&task->completion);
> +	}
> +
> +	return task;
> +}
> +EXPORT_SYMBOL_GPL(sas_alloc_task);
> +
> +void sas_free_task(struct sas_task *task)
> +{
> +	if (task) {
> +		BUG_ON(!list_empty(&task->list));
> +		kmem_cache_free(sas_task_cache, task);
> +	}
> +}
> +EXPORT_SYMBOL_GPL(sas_free_task);
> 
>  /*------------ SAS addr hash -----------*/
>  void sas_hash_addr(u8 *hashed, const u8 *sas_addr)
> @@ -293,8 +318,7 @@ EXPORT_SYMBOL_GPL(sas_domain_release_transport);
> 
>  static int __init sas_class_init(void)
>  {
> -	sas_task_cache = kmem_cache_create("sas_task", sizeof(struct
sas_task),
> -					   0, SLAB_HWCACHE_ALIGN, NULL);
> +	sas_task_cache = KMEM_CACHE(sas_task, SLAB_HWCACHE_ALIGN);
>  	if (!sas_task_cache)
>  		return -ENOMEM;
> 
> diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
> index 0ef2742..7921b61 100644
> --- a/drivers/scsi/mvsas/mv_sas.c
> +++ b/drivers/scsi/mvsas/mv_sas.c
> @@ -1518,28 +1518,6 @@ void mvs_dev_gone(struct domain_device *dev)
>  	mvs_dev_gone_notify(dev);
>  }
> 
> -static  struct sas_task *mvs_alloc_task(void)
> -{
> -	struct sas_task *task = kzalloc(sizeof(struct sas_task),
GFP_KERNEL);
> -
> -	if (task) {
> -		INIT_LIST_HEAD(&task->list);
> -		spin_lock_init(&task->task_state_lock);
> -		task->task_state_flags = SAS_TASK_STATE_PENDING;
> -		init_timer(&task->timer);
> -		init_completion(&task->completion);
> -	}
> -	return task;
> -}
> -
> -static  void mvs_free_task(struct sas_task *task)
> -{
> -	if (task) {
> -		BUG_ON(!list_empty(&task->list));
> -		kfree(task);
> -	}
> -}
> -
>  static void mvs_task_done(struct sas_task *task)
>  {
>  	if (!del_timer(&task->timer))
> @@ -1564,7 +1542,7 @@ static int mvs_exec_internal_tmf_task(struct
> domain_device *dev,
>  	struct sas_task *task = NULL;
> 
>  	for (retry = 0; retry < 3; retry++) {
> -		task = mvs_alloc_task();
> +		task = sas_alloc_task(GFP_KERNEL);
>  		if (!task)
>  			return -ENOMEM;
> 
> @@ -1622,15 +1600,14 @@ static int mvs_exec_internal_tmf_task(struct
> domain_device *dev,
>  				    SAS_ADDR(dev->sas_addr),
>  				    task->task_status.resp,
>  				    task->task_status.stat);
> -			mvs_free_task(task);
> +			sas_free_task(task);
>  			task = NULL;
> 
>  		}
>  	}
>  ex_err:
>  	BUG_ON(retry == 3 && task != NULL);
> -	if (task != NULL)
> -		mvs_free_task(task);
> +	sas_free_task(task);
>  	return res;
>  }
> 
> diff --git a/drivers/scsi/pm8001/pm8001_sas.c
> b/drivers/scsi/pm8001/pm8001_sas.c
> index 6ae059e..7dbbf8b 100644
> --- a/drivers/scsi/pm8001/pm8001_sas.c
> +++ b/drivers/scsi/pm8001/pm8001_sas.c
> @@ -669,30 +669,6 @@ int pm8001_dev_found(struct domain_device *dev)
>  	return pm8001_dev_found_notify(dev);
>  }
> 
> -/**
> -  * pm8001_alloc_task - allocate a task structure for TMF
> -  */
> -static struct sas_task *pm8001_alloc_task(void)
> -{
> -	struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL);
> -	if (task) {
> -		INIT_LIST_HEAD(&task->list);
> -		spin_lock_init(&task->task_state_lock);
> -		task->task_state_flags = SAS_TASK_STATE_PENDING;
> -		init_timer(&task->timer);
> -		init_completion(&task->completion);
> -	}
> -	return task;
> -}
> -
> -static void pm8001_free_task(struct sas_task *task)
> -{
> -	if (task) {
> -		BUG_ON(!list_empty(&task->list));
> -		kfree(task);
> -	}
> -}
> -
>  static void pm8001_task_done(struct sas_task *task)
>  {
>  	if (!del_timer(&task->timer))
> @@ -728,7 +704,7 @@ static int pm8001_exec_internal_tmf_task(struct
> domain_device *dev,
>  	struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
> 
>  	for (retry = 0; retry < 3; retry++) {
> -		task = pm8001_alloc_task();
> +		task = sas_alloc_task(GFP_KERNEL);
>  		if (!task)
>  			return -ENOMEM;
> 
> @@ -789,14 +765,13 @@ static int pm8001_exec_internal_tmf_task(struct
> domain_device *dev,
>  				SAS_ADDR(dev->sas_addr),
>  				task->task_status.resp,
>  				task->task_status.stat));
> -			pm8001_free_task(task);
> +			sas_free_task(task);
>  			task = NULL;
>  		}
>  	}
>  ex_err:
>  	BUG_ON(retry == 3 && task != NULL);
> -	if (task != NULL)
> -		pm8001_free_task(task);
> +	sas_free_task(task);
>  	return res;
>  }
> 
> @@ -811,7 +786,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info
> *pm8001_ha,
>  	struct sas_task *task = NULL;
> 
>  	for (retry = 0; retry < 3; retry++) {
> -		task = pm8001_alloc_task();
> +		task = sas_alloc_task(GFP_KERNEL);
>  		if (!task)
>  			return -ENOMEM;
> 
> @@ -864,14 +839,13 @@ pm8001_exec_internal_task_abort(struct
pm8001_hba_info
> *pm8001_ha,
>  				SAS_ADDR(dev->sas_addr),
>  				task->task_status.resp,
>  				task->task_status.stat));
> -			pm8001_free_task(task);
> +			sas_free_task(task);
>  			task = NULL;
>  		}
>  	}
>  ex_err:
>  	BUG_ON(retry == 3 && task != NULL);
> -	if (task != NULL)
> -		pm8001_free_task(task);
> +	sas_free_task(task);
>  	return res;
>  }
> 
> diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
> index ee86606..2517254 100644
> --- a/include/scsi/libsas.h
> +++ b/include/scsi/libsas.h
> @@ -555,36 +555,14 @@ struct sas_task {
>  	struct work_struct abort_work;
>  };
> 
> -extern struct kmem_cache *sas_task_cache;
> -
>  #define SAS_TASK_STATE_PENDING      1
>  #define SAS_TASK_STATE_DONE         2
>  #define SAS_TASK_STATE_ABORTED      4
>  #define SAS_TASK_NEED_DEV_RESET     8
>  #define SAS_TASK_AT_INITIATOR       16
> 
> -static inline struct sas_task *sas_alloc_task(gfp_t flags)
> -{
> -	struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
> -
> -	if (task) {
> -		INIT_LIST_HEAD(&task->list);
> -		spin_lock_init(&task->task_state_lock);
> -		task->task_state_flags = SAS_TASK_STATE_PENDING;
> -		init_timer(&task->timer);
> -		init_completion(&task->completion);
> -	}
> -
> -	return task;
> -}
> -
> -static inline void sas_free_task(struct sas_task *task)
> -{
> -	if (task) {
> -		BUG_ON(!list_empty(&task->list));
> -		kmem_cache_free(sas_task_cache, task);
> -	}
> -}
> +extern struct sas_task *sas_alloc_task(gfp_t flags);
> +extern void sas_free_task(struct sas_task *task);
> 
>  struct sas_domain_function_template {
>  	/* The class calls these to notify the LLDD of an event. */
> 
> --
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BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Xiangliang Yu]

Hi, all
I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37. And I test the AHCI driver in 2.6.39, the result is OK. I change queue-depth to 1 in 2.6.39, and kernel panic again. However, when add a printk debug statement in ata_sas_queuecmd function, and kernel panic is gone. According to the above, i think the bug is LIBSAS bug, may be is some lock issue. But can't find the real problem, so, please look at the issue. Thanks! See below for the log info:

drivers/scsi/mvsas/mv_sas.c 2204:port 1 ctrl sts=0x111000.
drivers/scsi/mvsas/mv_sas.c 2206:Port 1 irq sts = 0x1000081
drivers/scsi/mvsas/mv_sas.c 2204:port 1 ctrl sts=0x111000.
drivers/scsi/mvsas/mv_sas.c 2206:Port 1 irq sts = 0x10000
drivers/scsi/mvsas/mv_sas.c 2259:notify plug in on phy[1]
drivers/scsi/mvsas/mv_94xx.c 505:get all reg link rate is 0x111000
drivers/scsi/mvsas/mv_94xx.c 510:get link rate is 9
drivers/scsi/mvsas/mv_sas.c 1344:port 1 attach dev info is 20001
drivers/scsi/mvsas/mv_sas.c 1346:port 1 attach sas addr is 1
drivers/scsi/mvsas/mv_sas.c 379:phy 1 byte dmaded.
sas: phy-7:1 added to port-7:1, phy_mask:0x2 ( 100000000000000)
sas: DOING DISCOVERY on port 1, pid:66
drivers/scsi/mvsas/mv_sas.c 1509:found dev[0:5] is gone.
sas: Enter sas_scsi_recover_host
ata8: sas eh calling libata port error handler
ata9: sas eh calling libata port error handler
sas: sas_ata_hard_reset: Found ATA device.
ata9.00: ATA-7: ST3160815AS, 3.AAD, max UDMA/133
ata9.00: 312581808 sectors, multi 0: LBA48 NCQ (depth 31/32)
ata9.00: configured for UDMA/133
sas: --- Exit sas_scsi_recover_host
scsi_error_handler: restart op.
scsi_error_handler: autopm .
scsi 7:0:1:0: Direct-Access     ATA      ST3160815AS      3.AA PQ: 0 ANSI: 5
sd 7:0:1:0: [sdc] 312581808 512-byte logical blocks: (160 GB/149 GiB)
sd 7:0:1:0: Attached scsi generic sg2 type 0
sas: DONE DISCOVERY on port 1, pid:66, result:0
sd 7:0:1:0: [sdc] Write Protect is off
sd 7:0:1:0: [sdc] Mode Sense: 00 3a 00 00
sd 7:0:1:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sdc: detected capacity change from 0 to 160041885696
scsi_error_handler: set state.
 sdc: unknown partition table
sd 7:0:1:0: [sdc] Attached SCSI disk
drivers/scsi/mvsas/mv_sas.c 2204:port 1 ctrl sts=0x0.
drivers/scsi/mvsas/mv_sas.c 2206:Port 1 irq sts = 0x1001001
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [c] tag[c], task [efceae80]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [13] tag[13], task [efcea5c0]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [14] tag[14], task [efcea480]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [3] tag[3], task [f535e440]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [d] tag[d], task [efcead40]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [9] tag[9], task [f3a83bc0]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [1c] tag[1c], task [f3a83a80]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [1b] tag[1b], task [f3a83080]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [15] tag[15], task [efcea340]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [a] tag[a], task [efd92200]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [6] tag[6], task [efd92700]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [f] tag[f], task [efc11940]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [8] tag[8], task [efd92480]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [11] tag[11], task [f4200d40]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [12] tag[12], task [efcea700]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [1d] tag[1d], task [f535ebc0]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [16] tag[16], task [efd92340]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [5] tag[5], task [efd92840]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [1a] tag[1a], task [f4200c00]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [19] tag[19], task [f535e940]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [7] tag[7], task [f535e300]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [1] tag[1], task [efd92d40]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [b] tag[b], task [efd920c0]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [1e] tag[1e], task [f4200700]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [17] tag[17], task [efcea0c0]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [2] tag[2], task [f3a83940]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [0] tag[0], task [f535ed00]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [18] tag[18], task [f4200e80]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [10] tag[10], task [efc116c0]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [4] tag[4], task [efd92980]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2090:Release slot [e] tag[e], task [efc11d00]:
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2232:phy1 Unplug Notice
drivers/scsi/mvsas/mv_sas.c 2204:port 1 ctrl sts=0x0.
drivers/scsi/mvsas/mv_sas.c 2206:Port 1 irq sts = 0x1
sas: Enter sas_scsi_recover_host
ata9: sas eh calling libata cmd error handler
ata8: sas eh calling libata port error handler
ata9: sas eh calling libata port error handler
ata9.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x6
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:b0:eb:37/00:00:0e:00:00/40 tag 0 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:a0:af:69/00:00:00:00:00/40 tag 1 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:f8:df:d2/00:00:10:00:00/40 tag 2 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:b8:95:8e/00:00:0e:00:00/40 tag 3 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:58:9d:60/00:00:01:00:00/40 tag 4 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:98:13:4f/00:00:02:00:00/40 tag 5 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:10:72:3d/00:00:08:00:00/40 tag 6 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:c0:64:0d/00:00:00:00:00/40 tag 7 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:c8:62:fb/00:00:0f:00:00/40 tag 8 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:90:9e:29/00:00:10:00:00/40 tag 9 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:38:08:50/00:00:0f:00:00/40 tag 10 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:90:15:f6/00:00:0f:00:00/40 tag 11 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:28:b9:f3/00:00:0b:00:00/40 tag 12 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:28:e5:90/00:00:0b:00:00/40 tag 13 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:c0:9a:85/00:00:0a:00:00/40 tag 14 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:48:d4:3e/00:00:00:00:00/40 tag 15 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:48:11:30/00:00:0c:00:00/40 tag 16 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:c0:a4:8c/00:00:0b:00:00/40 tag 17 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:78:2b:bf/00:00:0e:00:00/40 tag 18 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:38:ff:84/00:00:0c:00:00/40 tag 19 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:28:49:41/00:00:0c:00:00/40 tag 20 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:90:c9:09/00:00:11:00:00/40 tag 21 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:40:bd:5d/00:00:01:00:00/40 tag 22 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:38:da:c3/00:00:01:00:00/40 tag 23 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:c0:1b:f4/00:00:06:00:00/40 tag 24 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:80:26:4b/00:00:03:00:00/40 tag 25 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:48:d1:7c/00:00:00:00:00/40 tag 26 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:b0:1f:0d/00:00:12:00:00/40 tag 27 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:08:55:9e/00:00:0b:00:00/40 tag 28 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:58:5b:12/00:00:04:00:00/40 tag 29 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9.00: failed command: READ FPDMA QUEUED
ata9.00: cmd 60/08:00:e8:03:be/00:00:0e:00:00/40 tag 30 ncq 4096 in
         res 01/04:20:58:9d:60/00:00:01:00:00/40 Emask 0x12 (ATA bus error)
ata9.00: status: { ERR }
ata9.00: error: { ABRT }
ata9: hard resetting link
sas: sas_ata_hard_reset: Found ATA device.
drivers/scsi/mvsas/mv_sas.c 906:SATA/STP port 1 does not attachdevice.
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 2139:phy1 Removed Device
sas_deform_port: 1.
drivers/scsi/mvsas/mv_sas.c 906:SATA/STP port 1 does not attachdevice.
sas: sas_ata_task_done: SAS error 8a
ata9.00: both IDENTIFYs aborted, assuming NODEV
ata9.00: revalidation failed (errno=-2)
sd 7:0:1:0: [sdc] Synchronizing SCSI cache
ata9: hard resetting link
sas: sas_ata_hard_reset: Found ATA device.
drivers/scsi/mvsas/mv_sas.c 906:SATA/STP port 1 does not attachdevice.
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 906:SATA/STP port 1 does not attachdevice.
sas: sas_ata_task_done: SAS error 8a
ata9.00: both IDENTIFYs aborted, assuming NODEV
ata9.00: revalidation failed (errno=-2)
ata9: hard resetting link
sas: sas_ata_hard_reset: Found ATA device.
drivers/scsi/mvsas/mv_sas.c 906:SATA/STP port 1 does not attachdevice.
sas: sas_ata_task_done: SAS error 8a
drivers/scsi/mvsas/mv_sas.c 906:SATA/STP port 1 does not attachdevice.
sas: sas_ata_task_done: SAS error 8a
ata9.00: both IDENTIFYs aborted, assuming NODEV
ata9.00: revalidation failed (errno=-2)
ata9.00: disabled
ata9: EH complete
sas: --- Exit sas_scsi_recover_host
scsi_error_handler: restart op.
scsi_error_handler: autopm .
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0e be 03 e8 00 00 08 00
end_request: I/O error, dev sdc, sector 247333864
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 04 12 5b 58 00 00 08 00
end_request: I/O error, dev sdc, sector 68311896
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0b 9e 55 08 00 00 08 00
end_request: I/O error, dev sdc, sector 194925832
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 12 0d 1f b0 00 00 08 00
end_request: I/O error, dev sdc, sector 302849968
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 00 7c d1 48 00 00 08 00
end_request: I/O error, dev sdc, sector 8180040
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 03 4b 26 80 00 00 08 00
end_request: I/O error, dev sdc, sector 55256704
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 06 f4 1b c0 00 00 08 00
end_request: I/O error, dev sdc, sector 116661184
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 01 c3 da 38 00 00 08 00
end_request: I/O error, dev sdc, sector 29612600
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 01 5d bd 40 00 00 08 00
end_request: I/O error, dev sdc, sector 22920512
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 11 09 c9 90 00 00 08 00
end_request: I/O error, dev sdc, sector 285854096
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0c 41 49 28 00 00 08 00
end_request: I/O error, dev sdc, sector 205605160
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0c 84 ff 38 00 00 08 00
end_request: I/O error, dev sdc, sector 210042680
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0e bf 2b 78 00 00 08 00
end_request: I/O error, dev sdc, sector 247409528
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0b 8c a4 c0 00 00 08 00
end_request: I/O error, dev sdc, sector 193766592
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0c 30 11 48 00 00 08 00
end_request: I/O error, dev sdc, sector 204476744
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 00 3e d4 48 00 00 08 00
end_request: I/O error, dev sdc, sector 4117576
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0a 85 9a c0 00 00 08 00
end_request: I/O error, dev sdc, sector 176528064
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0b 90 e5 28 00 00 08 00
end_request: I/O error, dev sdc, sector 194045224
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0b f3 b9 28 00 00 08 00
end_request: I/O error, dev sdc, sector 200522024
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0f f6 15 90 00 00 08 00
end_request: I/O error, dev sdc, sector 267785616
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0f 50 08 38 00 00 08 00
end_request: I/O error, dev sdc, sector 256903224
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 10 29 9e 90 00 00 08 00
end_request: I/O error, dev sdc, sector 271163024
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0f fb 62 c8 00 00 08 00
end_request: I/O error, dev sdc, sector 268133064
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 00 0d 64 c0 00 00 08 00
end_request: I/O error, dev sdc, sector 877760
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 08 3d 72 10 00 00 08 00
end_request: I/O error, dev sdc, sector 138244624
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 02 4f 13 98 00 00 08 00
end_request: I/O error, dev sdc, sector 38736792
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 01 60 9d 58 00 00 08 00
end_request: I/O error, dev sdc, sector 23108952
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0e 8e 95 b8 00 00 08 00
end_request: I/O error, dev sdc, sector 244225464
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 10 d2 df f8 00 00 08 00
end_request: I/O error, dev sdc, sector 282255352
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 00 69 af a0 00 00 08 00
end_request: I/O error, dev sdc, sector 6926240
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] CDB: Read(10): 28 00 0e 37 eb b0 00 00 08 00
end_request: I/O error, dev sdc, sector 238545840
scsi_io_completion: end request.
sd 7:0:1:0: [sdc] Unhandled error code
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
sd 7:0:1:0: [sdc] Stopping disk
sd 7:0:1:0: [sdc] START_STOP FAILED
sd 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
drivers/scsi/mvsas/mv_sas.c 1509:found dev[0:5] is gone.
sas_deform_port: 2.
sas_deform_port: 3.
scsi 7:0:1:0: [sdc]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
scsi 7:0:1:0: [sdc] CDB: Read(10): 28 00 12 37 3a 60 00 00 08 00
end_request: I/O error, dev sdc, sector 305609312
BUG: unable to handle kernel paging request at 76656453
IP: [<c051c9a4>] elv_completed_request+0x31/0x3e
*pde = 00000000
Oops: 0000 [#1] SMP
last sysfs file: /sys/block/sdb/stat
Modules linked in: mvsas libsas ipv6 autofs4 cpufreq_ondemand acpi_cpufreq mperf loop dm_multipath scsi_dh video sbs sbshc power_meter hwmon battery ac power_supply lp sg option usb_wwan usbserial tpm_tis tpm r8169 mii i2c_i801 i2c_core tpm_bios scsi_transport_sas rtc_cmos rtc_core rtc_lib button serio_raw parport_pc parport pcspkr dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod ata_piix ahci libahci libata sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: libsas]

Pid: 9099, comm: scsi_eh_7 Not tainted 2.6.39 #5 System manufacturer System Product Name/P7H55-M
EIP: 0060:[<c051c9a4>] EFLAGS: 00010002 CPU: 0
EIP is at elv_completed_request+0x31/0x3e
EAX: 7665642f EBX: f5776504 ECX: f5e629c0 EDX: f3b17a28
ESI: f3b17a28 EDI: f5776504 EBP: f5776504 ESP: f5c0df50
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Process scsi_eh_7 (pid: 9099, ti=f5c0c000 task=f5778490 task.ti=f4b2a000)
Stack:
 00000246 c051f624 00000246 f3b17a28 fffffffb f5776504 c051fa63 fffffffb
 f3b17a28 fffffffb f3b17a28 c051fa80 00000000 c051fab0 f83d69fc f41e48c0
 f83c3819 00000000 00040000 f5776504 00000000 00000000 f5776504 00000000
Call Trace:
 [<c051f624>] ? __blk_put_request+0x22/0x99
 [<c051fa63>] ? blk_end_bidi_request+0x34/0x4a
 [<c051fa80>] ? blk_end_request+0x7/0xc
 [<c051fab0>] ? blk_end_request_err+0x2b/0x31
 [<f83c3819>] ? scsi_io_completion+0x3a7/0x402 [scsi_mod]
 [<c0524f5a>] ? blk_done_softirq+0x42/0x50
 [<c0433668>] ? __do_softirq+0xa5/0x143
 [<c04335c3>] ? local_bh_enable_ip+0x67/0x67
 <IRQ>
 [<c0417743>] ? smp_apic_timer_interrupt+0x6b/0x75
 [<c069d91a>] ? apic_timer_interrupt+0x2a/0x30
 [<c042007b>] ? flush_tlb_mm+0x3d/0x5b
 [<c042fdd1>] ? vprintk+0x331/0x33d
 [<f83c432c>] ? scsi_request_fn+0x2fb/0x3bb [scsi_mod]
 [<c04528c2>] ? module_refcount+0x64/0x77
 [<f83c1e54>] ? scsi_block_when_processing_errors+0xc7/0xc7 [scsi_mod]
 [<c042fdf1>] ? printk+0x14/0x18
 [<f83c22bc>] ? scsi_error_handler+0x468/0x4e0 [scsi_mod]
 [<c042bd99>] ? complete+0x28/0x36
 [<f83c1e54>] ? scsi_block_when_processing_errors+0xc7/0xc7 [scsi_mod]
 [<c0443c46>] ? kthread+0x65/0x6a
 [<c0443be1>] ? kthread_stop+0x8d/0x8d
 [<c06a27f6>] ? kernel_thread_helper+0x6/0xd
Code: 8b 42 20 f6 c4 40 74 2e 83 7a 24 01 74 04 a8 40 74 24 83 e0 11 48 0f 95 c0 83 e0 01 ff 8c 83 64 02 00 00 f6 42 21 04 74 0d 8b 01 <8b> 48 24 85 c9 74 04 89 d8 ff d1 5b c3 8d 42 4c e8 9a 40 01 00
EIP: [<c051c9a4>] elv_completed_request+0x31/0x3e SS:ESP 0068:f5c0df50
CR2: 0000000076656453
---[ end trace 29b20858e32b84e9 ]---
Kernel panic - not syncing: Fatal exception in interrupt
Pid: 9099, comm: scsi_eh_7 Tainted: G      D     2.6.39 #5
Call Trace:
 [<c042f1e6>] ? panic+0x53/0x12e
 [<c069e3b2>] ? oops_end+0x89/0x94
 [<c041cf29>] ? no_context+0x10d/0x116
 [<c041d07c>] ? bad_area_nosemaphore+0xa/0xc
 [<c069fc03>] ? do_page_fault+0x3b8/0x3c0
 [<c04d0f75>] ? aio_complete+0x155/0x15f
 [<c069d427>] ? _raw_spin_lock_irqsave+0x9/0xd
 [<c05a0ded>] ? mix_pool_bytes_extract+0x4d/0x135
 [<c069f84b>] ? vmalloc_fault+0xc3/0xc3
 [<c069db3a>] ? error_code+0x5a/0x60
 [<c05a00d8>] ? pci_ite887x_init+0x206/0x206
 [<c069f84b>] ? vmalloc_fault+0xc3/0xc3
 [<c051c9a4>] ? elv_completed_request+0x31/0x3e
 [<c051f624>] ? __blk_put_request+0x22/0x99
 [<c051fa63>] ? blk_end_bidi_request+0x34/0x4a
 [<c051fa80>] ? blk_end_request+0x7/0xc
 [<c051fab0>] ? blk_end_request_err+0x2b/0x31
 [<f83c3819>] ? scsi_io_completion+0x3a7/0x402 [scsi_mod]
 [<c0524f5a>] ? blk_done_softirq+0x42/0x50
 [<c0433668>] ? __do_softirq+0xa5/0x143
 [<c04335c3>] ? local_bh_enable_ip+0x67/0x67
 <IRQ>  [<c0417743>] ? smp_apic_timer_interrupt+0x6b/0x75
 [<c069d91a>] ? apic_timer_interrupt+0x2a/0x30
 [<c042007b>] ? flush_tlb_mm+0x3d/0x5b
 [<c042fdd1>] ? vprintk+0x331/0x33d
 [<f83c432c>] ? scsi_request_fn+0x2fb/0x3bb [scsi_mod]
 [<c04528c2>] ? module_refcount+0x64/0x77
 [<f83c1e54>] ? scsi_block_when_processing_errors+0xc7/0xc7 [scsi_mod]
 [<c042fdf1>] ? printk+0x14/0x18
 [<f83c22bc>] ? scsi_error_handler+0x468/0x4e0 [scsi_mod]
 [<c042bd99>] ? complete+0x28/0x36
 [<f83c1e54>] ? scsi_block_when_processing_errors+0xc7/0xc7 [scsi_mod]
 [<c0443c46>] ? kthread+0x65/0x6a
 [<c0443be1>] ? kthread_stop+0x8d/0x8d
 [<c06a27f6>] ? kernel_thread_helper+0x6/0xd

Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Dan Williams]

On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
> Hi, all
> I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37

If it is a stable reproduction can you bisect it?

RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Xiangliang Yu]

>Subject: Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

>On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
>> Hi, all
>> I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37

>If it is a stable reproduction can you bisect it?
What I use is latest kernel version (2.6.39).

Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Dan Williams]

On Thu, Jun 2, 2011 at 11:45 PM, Xiangliang Yu <yuxiangl@marvell.com> wrote:
>
>
>>Subject: Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O
>
>>On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
>>> Hi, all
>>> I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37
>
>>If it is a stable reproduction can you bisect it?
> What I use is latest kernel version (2.6.39).

Right, if the driver consistently fails in 2.6.39 and runs fine in
2.6.37 then you can use git bisect [1] to possibly find the commit
that broke things.

git bisect start
git bisect bad v2.6.39
git bisect good v2.6.37
<run test>
git bisect good/bad depending on test results.

Although you might try 2.6.38 first to cut down on the number of
kernels you need to test.

--
Dan

[1]: http://www.kernel.org/pub/software/scm/git/docs/git-bisect-lk2009.html

Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Bart Van Assche]

On Fri, Jun 3, 2011 at 8:45 AM, Xiangliang Yu <yuxiangl@marvell.com> wrote:
> >On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
> > > Hi, all
> > > I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37
>
> > If it is a stable reproduction can you bisect it?
> What I use is latest kernel version (2.6.39).

Although I'm not sure this will help, it might be worth trying
2.6.39.1. There are some block layer fixes in 2.6.39.1.

Bart.

RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Jack Wang]

I can reproduce this panic in 2.6.39, and found 2.6.39rc1 works fine.

> 
> On Fri, Jun 3, 2011 at 8:45 AM, Xiangliang Yu <yuxiangl@marvell.com>
wrote:
> > >On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
> > > > Hi, all
> > > > I upgrade kernel version to 2.6.39 and find out a kernel panic when
I
> test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the
driver
> is OK in version 2.6.37
> >
> > > If it is a stable reproduction can you bisect it?
> > What I use is latest kernel version (2.6.39).
> 
> Although I'm not sure this will help, it might be worth trying
> 2.6.39.1. There are some block layer fixes in 2.6.39.1.
> 
> Bart.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Jack Wang]

I update to 2.6.39.1, the panic seems disappear.

Jack
> 
> I can reproduce this panic in 2.6.39, and found 2.6.39rc1 works fine.
> 
> >
> > On Fri, Jun 3, 2011 at 8:45 AM, Xiangliang Yu <yuxiangl@marvell.com>
> wrote:
> > > >On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
> > > > > Hi, all
> > > > > I upgrade kernel version to 2.6.39 and find out a kernel panic
when
> I
> > test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the
> driver
> > is OK in version 2.6.37
> > >
> > > > If it is a stable reproduction can you bisect it?
> > > What I use is latest kernel version (2.6.39).
> >
> > Although I'm not sure this will help, it might be worth trying
> > 2.6.39.1. There are some block layer fixes in 2.6.39.1.
> >
> > Bart.
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Xiangliang Yu]

>>>Subject: Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O
>>
>>>On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
>>>> Hi, all
>>>> I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37
>>
>>>If it is a stable reproduction can you bisect it?
>> What I use is latest kernel version (2.6.39).

>Right, if the driver consistently fails in 2.6.39 and runs fine in
>2.6.37 then you can use git bisect [1] to possibly find the commit
>that broke things.
>
>git bisect start
>git bisect bad v2.6.39
>git bisect good v2.6.37
><run test>
>git bisect good/bad depending on test results.

>Although you might try 2.6.38 first to cut down on the number of
>kernels you need to test.

2.6.39-rc4 work fine, but 2.6.39-rc5 has kernel panic.

RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Xiangliang Yu]

>I update to 2.6.39.1, the panic seems disappear.
No, it still have.

To JBottomley@parallels.com:
Why did you remove MVSAS patches in version 2.6.39.1? 
(http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-misc-2.6.git;a=commit;h=0b15fb1fdfd403726542cb6111bc916b7a9f7fad)

Thanks!

Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Dan Williams]

On Mon, Jun 6, 2011 at 8:32 PM, Xiangliang Yu <yuxiangl@marvell.com> wrote:
>>>>Subject: Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O
>>>
>>>>On 6/2/2011 8:27 PM, Xiangliang Yu wrote:
>>>>> Hi, all
>>>>> I upgrade kernel version to 2.6.39 and find out a kernel panic when I test the MVSAS driver: kernel panic if hot-plug disk during I/O. But the driver is OK in version 2.6.37
>>>
>>>>If it is a stable reproduction can you bisect it?
>>> What I use is latest kernel version (2.6.39).
>
>>Right, if the driver consistently fails in 2.6.39 and runs fine in
>>2.6.37 then you can use git bisect [1] to possibly find the commit
>>that broke things.
>>
>>git bisect start
>>git bisect bad v2.6.39
>>git bisect good v2.6.37
>><run test>
>>git bisect good/bad depending on test results.
>
>>Although you might try 2.6.38 first to cut down on the number of
>>kernels you need to test.
>
> 2.6.39-rc4 work fine, but 2.6.39-rc5 has kernel panic.

Still smells like a regression.  If you run a git bisect between those
two versions it should be pretty straightforward to identify the
offending commit.  There were some interesting block/scsi changes in
that window:

Jens Axboe (5):
      block: kill blk_flush_plug_list() export
      cfq-iosched: read_lock() does not always imply rcu_read_lock()
      block: get rid of QUEUE_FLAG_REENTER
      block: remove stale kerneldoc member from __blk_run_queue()
      elevator: check for ELEVATOR_INSERT_SORT_MERGE in !elvpriv case too

Liu Yuan (1):
      block, blk-sysfs: Fix an err return path in blk_register_queue()

Tao Ma (1):
      block: Remove the extra check in queue_requests_store

Tejun Heo (1):
      block: don't propagate unlisted DISK_EVENTs to userland

--
Dan

Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Stefan Richter]

On Jun 07 Dan Williams wrote:
> On Mon, Jun 6, 2011 at 8:32 PM, Xiangliang Yu <yuxiangl@marvell.com> wrote:
> > 2.6.39-rc4 work fine, but 2.6.39-rc5 has kernel panic.
> 
> Still smells like a regression.  If you run a git bisect between those
> two versions it should be pretty straightforward to identify the
> offending commit.  There were some interesting block/scsi changes in
> that window:
> 
> Jens Axboe (5):
>       block: kill blk_flush_plug_list() export
>       cfq-iosched: read_lock() does not always imply rcu_read_lock()
>       block: get rid of QUEUE_FLAG_REENTER
>       block: remove stale kerneldoc member from __blk_run_queue()
>       elevator: check for ELEVATOR_INSERT_SORT_MERGE in !elvpriv case too
> 
> Liu Yuan (1):
>       block, blk-sysfs: Fix an err return path in blk_register_queue()
> 
> Tao Ma (1):
>       block: Remove the extra check in queue_requests_store
> 
> Tejun Heo (1):
>       block: don't propagate unlisted DISK_EVENTs to userland

Or try linux 3.0-rc2 which as yet another block queue lifetime vs. hotplug
fix (which is not yet available in a 2.6.39.y kernel).
-- 
Stefan Richter
-=====-==-== -==- --===
http://arcgraph.de/sr/

RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Xiangliang Yu]

>> > 2.6.39-rc4 work fine, but 2.6.39-rc5 has kernel panic.
>> 
>> Still smells like a regression.  If you run a git bisect between those
>> two versions it should be pretty straightforward to identify the
>> offending commit.  There were some interesting block/scsi changes in
>> that window:
>> 
>> Jens Axboe (5):
>>       block: kill blk_flush_plug_list() export
> >      cfq-iosched: read_lock() does not always imply rcu_read_lock()
> >      block: get rid of QUEUE_FLAG_REENTER
> >     block: remove stale kerneldoc member from __blk_run_queue()
> >      elevator: check for ELEVATOR_INSERT_SORT_MERGE in !elvpriv case too
>> 
>> Liu Yuan (1):
>>       block, blk-sysfs: Fix an err return path in blk_register_queue()
>> 
>> Tao Ma (1):
>>       block: Remove the extra check in queue_requests_store
>> 
>> Tejun Heo (1):
>>       block: don't propagate unlisted DISK_EVENTs to userland

>Or try linux 3.0-rc2 which as yet another block queue lifetime vs. hotplug
>fix (which is not yet available in a 2.6.39.y kernel).

It still kernel panic.

Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Dan Williams]

[ copying Rafael as this appears to be getting into regression territory ]

On Mon, Jun 13, 2011 at 12:21 AM, Xiangliang Yu <yuxiangl@marvell.com> wrote:
>
>
>>> > 2.6.39-rc4 work fine, but 2.6.39-rc5 has kernel panic.
>>>
>>> Still smells like a regression.  If you run a git bisect between those
>>> two versions it should be pretty straightforward to identify the
>>> offending commit.  There were some interesting block/scsi changes in
>>> that window:
>>>
>>> Jens Axboe (5):
>>>       block: kill blk_flush_plug_list() export
>> >      cfq-iosched: read_lock() does not always imply rcu_read_lock()
>> >      block: get rid of QUEUE_FLAG_REENTER
>> >     block: remove stale kerneldoc member from __blk_run_queue()
>> >      elevator: check for ELEVATOR_INSERT_SORT_MERGE in !elvpriv case too
>>>
>>> Liu Yuan (1):
>>>       block, blk-sysfs: Fix an err return path in blk_register_queue()
>>>
>>> Tao Ma (1):
>>>       block: Remove the extra check in queue_requests_store
>>>
>>> Tejun Heo (1):
>>>       block: don't propagate unlisted DISK_EVENTs to userland
>
>>Or try linux 3.0-rc2 which as yet another block queue lifetime vs. hotplug
>>fix (which is not yet available in a 2.6.39.y kernel).
>
> It still kernel panic.

In the same way?  So to recap all kernels prior to 2.6.39-rc4 do not
show this problem, and that you have individually tested v2.6.39-rc5
and 3.0-rc2 and the problem still exists, but that you don't know the
precise commit between 2.6.39-rc4 and 2.6.39-rc5 that causes the
problem?  I still think a bisect would be useful, and in the meantime
I'll see if this can be reproduced reliably with isci (but presently
isci has its own internal hotplug issues that are being worked).

--
Dan
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RE: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

[Xiangliang Yu]

>Subject: Re: BUG: linux-2.6.39 kernel panic issue when hot-plut disk during I/O

>[ copying Rafael as this appears to be getting into regression territory ]

>On Mon, Jun 13, 2011 at 12:21 AM, Xiangliang Yu <yuxiangl@marvell.com> wrote:
>>
>>
>>>> > 2.6.39-rc4 work fine, but 2.6.39-rc5 has kernel panic.
>>>>
>>>> Still smells like a regression.  If you run a git bisect between those
>>>> two versions it should be pretty straightforward to identify the
>>>> offending commit.  There were some interesting block/scsi changes in
>>>> that window:
>>>>
>>>> Jens Axboe (5):
>>>>       block: kill blk_flush_plug_list() export
>>> >      cfq-iosched: read_lock() does not always imply rcu_read_lock()
>>> >      block: get rid of QUEUE_FLAG_REENTER
>>> >     block: remove stale kerneldoc member from __blk_run_queue()
>>> >      elevator: check for ELEVATOR_INSERT_SORT_MERGE in !elvpriv case too
>>>>
>>>> Liu Yuan (1):
>>>>       block, blk-sysfs: Fix an err return path in blk_register_queue()
>>>>
>>>> Tao Ma (1):
>>>>       block: Remove the extra check in queue_requests_store
>>>>
>>>> Tejun Heo (1):
>>>>       block: don't propagate unlisted DISK_EVENTs to userland
>>
>>>Or try linux 3.0-rc2 which as yet another block queue lifetime vs. hotplug
>>>fix (which is not yet available in a 2.6.39.y kernel).
>>
>> It still kernel panic.

>In the same way?  
yes
>So to recap all kernels prior to 2.6.39-rc4 do not
>show this problem, and that you have individually tested v2.6.39-rc5
>and 3.0-rc2 and the problem still exists, but that you don't know the
>precise commit between 2.6.39-rc4 and 2.6.39-rc5 that causes the
problem?  
Yes
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