On 1/15/2013 9:49 PM, James Bottomley wrote:
On Tue, 2013-01-15 at 21:31 +0530, Subhash Jadavani wrote:
blk_rq_map_sg() function merges the physically contiguous pages to use same
scatter-gather node without checking if their page descriptors are
contiguous or not.
Now when dma_map_sg() is call
On 01/16/2013 11:31 AM, Rusty Russell wrote:
> Wanlong Gao writes:
>> Add hot cpu notifier to reset the request virtqueue affinity
>> when doing cpu hotplug.
>
> You need to be careful to get_online_cpus() and put_online_cpus() here,
> so CPUs can't go up and down in the middle of operations.
>
Wanlong Gao writes:
> Add hot cpu notifier to reset the request virtqueue affinity
> when doing cpu hotplug.
You need to be careful to get_online_cpus() and put_online_cpus() here,
so CPUs can't go up and down in the middle of operations.
In particular, get_online_cpus()/put_online_cpus() around
Hi Linus,
The following are the target pending fixes headed into v3.8-rc4. Please
go ahead and pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git master
This includes an important >= v3.6 regression bugfix for active I/O
shutdown (Roland), some TMR related failure
On Tue, 2013-01-15 at 21:31 +0530, Subhash Jadavani wrote:
> blk_rq_map_sg() function merges the physically contiguous pages to use same
> scatter-gather node without checking if their page descriptors are
> contiguous or not.
>
> Now when dma_map_sg() is called on the scatter gather list, it woul
blk_rq_map_sg() function merges the physically contiguous pages to use same
scatter-gather node without checking if their page descriptors are
contiguous or not.
Now when dma_map_sg() is called on the scatter gather list, it would
take the base page pointer from each node (one by one) and iterates
Multipath might detect a path down even though the LLDD
hasn't registered a link down event.
This patch makes the 'port_state' FC attribute writeable
to enforce a link down scenario in these cases, allowing
for a fast failover to the remaining ports.
Cc: Chad Dupuis
Cc: Andrew Vasquez
Cc: James
Add hot cpu notifier to reset the request virtqueue affinity
when doing cpu hotplug.
Signed-off-by: Wanlong Gao
---
drivers/scsi/virtio_scsi.c | 30 ++
1 file changed, 30 insertions(+)
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index 16b0ef
These two patches are based on the multi-queue virtio-scsi patch set.
We set cpu affinity when the num_queues equals to the number
of VCPUs. Split out the set affinity function, this also
fix the bug when CPU IDs are not consecutive.
Signed-off-by: Wanlong Gao
---
drivers/scsi/virtio_scsi.c | 5
Since the ata acpi notification code introduced in commit
3bd46600a7a7e938c54df8cdbac9910668c7dfb0 is solely for ZPODD, and we
now have a dedicated place for it, move these code there.
And the ata_acpi_add_pm_notifier code is changed a little bit in that it
is now invoked when scsi device is not b
Per the Mount Fuji spec, the ODD is considered zero power ready when:
- For slot type ODD, no media inside;
- For tray type ODD, no media inside and tray closed.
The information can be retrieved by either the returned information of
command GET_EVENT_STATUS_NOTIFICATION(the command is used to
When the ODD is powered off, any action the user did to the ODD that
would generate a media event will trigger an ACPI interrupt, so the
poll for media event is no longer necessary. And the poll will also
cause a runtime status change, which will stop the ODD from staying in
powered off state, so t
Expose pm qos flags to user space so that user has a chance to disable
ZPODD feature, if he/she has a broken platform or devices or simply does
not like this feature.
This flag is exposed to user space only for ZPODD devices.
Due to this flag, it is possible the ODD is ZP ready but we didn't powe
Commit 166a2967b45ede2e2e56f3ede3cd32053dc17812 "libata: tell scsi layer
device supports runtime power off" introduced the can_power_off flag for
scsi_device and is used to support ZPODD implementation in SCSI layer.
Since ZPODD is now implemented in ATA layer, that flag is no longer
needed, so rem
This patch adds runtime pm support for sr.
It did this by increasing the runtime usage_count of the device when:
- its block device is opened;
- the events checking is to run.
And decreasing the runtime usage_count of the device when:
- its block device is closed;
- After the events checking is d
When ata port is runtime suspended, it will check if the ODD attched to
it is a zero power(ZP) capable ODD and if the ZP capable ODD is in zero
power ready state. And if this is not the case, the highest acpi state
will be limited to ACPI_STATE_D3_HOT to avoid powering off the ODD. And
if the ODD c
For ODDs, the upper layer will poll for media change every few
seconds, which will make it enter and leave suspend state very
often. And as each suspend will also cause a hard/soft reset,
the gain of runtime suspend is very little while the ODD may
malfunction after constantly being reset. So the i
The ODD can be enabled for ZPODD if the following three conditions are
satisfied:
1 The ODD supports device attention;
2 The platform can runtime power off the ODD through ACPI;
3 The ODD is either slot type or drawer type.
For such ODDs, zpodd_init is called and a new structure is allocated for
it
v13:
Use atomic type for disk_events_disable_depth, so that disabling can
stack and has its own synchronization rule as suggested by Tejun Heo;
Set zp_ready to false whenever we found the ODD is not in ZP ready state
due to support of NO_POWEROFF qos flag. This change is made in patch 6
instead of
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