For multipage BIOs, we were always using sg[0] instead of advancing
through the list. Oops :-)
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
If POISON_POINTER_DELTA isn't defined, ensure they're in page 0 which
should never be mapped.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
In the bio completion handler, check for bios on the congestion list
for this NVM queue. Also, lock the congestion list in the make_request
function as the queue may end up being shared between multiple CPUs.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
In addition to recording the completion data for each command, record
the anticipated completion time. Choose a timeout of 5 seconds for
normal I/Os and 60 seconds for admin I/Os.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
If we're sharing a queue between multiple CPUs and we cancel a sync I/O,
we must have the queue locked to avoid corrupting the stack of the thread
that submitted the I/O. It turns out this is the same locking that's needed
for the threaded irq handler, so share that code.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
If the adapter completes a command ID that is outside the bounds of
the array, return CMD_CTX_INVALID instead of random data, and print a
message in the sync_completion handler (which is rapidly becoming the
misc completion handler :-)
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Set the context value to CMD_CTX_COMPLETED, and print a message in the
sync_completion handler if we see it.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
I have plans for other special values in sync_completion. Plus, this
is more self-documenting, and lets us detect bogus usages.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
We're currently calling bio_endio from hard interrupt context. This is
not a good idea for preemptible kernels as it will cause longer latencies.
Using a threaded interrupt will run the entire queue processing mechanism
(including bio_endio) in a thread, which can be preempted. Unfortuantely,
it also adds about 7us of latency to the single-I/O case, so make it a
module parameter for the moment.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
We can't have preemption disabled when we call schedule(). Accept the
possibility that we'll get preempted, and it'll cost us some cacheline
bounces.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
If the user sends a fatal signal, sleeping in the TASK_KILLABLE state
permits the task to be aborted. The only wrinkle is making sure that
if/when the command completes later that it doesn't upset anything.
Handle this by setting the data pointer to 0, and checking the value
isn't NULL in the sync completion path. Eventually, bios can be cancelled
through this path too. Note that the cmdid isn't freed to prevent reuse.
We should also abort the command in the future, but this is a good start.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Because I wasn't setting driverfs_dev, the devices were showing up under
/sys/devices/virtual/block. Now they appear underneath the PCI device
which they belong to.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
In case the card has been left in a partially-configured state,
write 0 to the Enable bit.
Signed-off-by: Shane Michael Matthews <shane.matthews@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Call pci_enable_device_mem() at initialisation and pci_disable_device
at exit.
Signed-off-by: Shane Michael Matthews <shane.matthews@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Factor out most of nvme_identify() into a new nvme_submit_user_admin_command()
function. Change nvme_get_range_type() to call it and change nvme_ioctl to
realise that it's getting back all 64 ranges.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Generalise the code from nvme_identify() that sets PRP1 & PRP2 so that
it's usable for commands sent by nvme_submit_bio_queue().
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Add prp1, prp2 and the metadata prp to the common command, since the
fields are generally used this way.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
The admin IRQ is supposed to use the pin-based (or single message MSI)
interrupt. Accomplish this by filling in entry[0]'s vector with the
INTx irq number.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Two callers with an almost identical long string of arguments, and
introducing a third soon. Time to factor out the commonalities.
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
When Xen is enabled, using BIOVEC_PHYS_MERGEABLE in a module
causes xen_biovec_phys_mergeable to be referenced, so it needs
to be exported.
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
* git://git.infradead.org/iommu-2.6:
intel-iommu: fix superpage support in pfn_to_dma_pte()
intel-iommu: set iommu_superpage on VM domains to lowest common denominator
intel-iommu: fix return value of iommu_unmap() API
MAINTAINERS: Update VT-d entry for drivers/pci -> drivers/iommu move
intel-iommu: Export a flag indicating that the IOMMU is used for iGFX.
intel-iommu: Workaround IOTLB hang on Ironlake GPU
intel-iommu: Fix AB-BA lockdep report
Commit 4b239f458 ("x86-64, mm: Put early page table high") causes a S4
regression since 2.6.39, namely the machine reboots occasionally at S4
resume. It doesn't happen always, overall rate is about 1/20. But,
like other bugs, once when this happens, it continues to happen.
This patch fixes the problem by essentially reverting the memory
assignment in the older way.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: <stable@kernel.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Yinghai Lu <yinghai.lu@oracle.com>
[ We'll hopefully find the real fix, but that's too late for 3.1 now ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix memory leak introduced by commit a6e50b409d
(dm snapshot: skip reading origin when overwriting complete chunk).
When allocating a set of jobs from kc->job_pool, job->master_job must be
set (to point to itself) so that the mempool item gets freed when the
master_job completes.
master_job was introduced by commit c6ea41fbbe
(dm kcopyd: preallocate sub jobs to avoid deadlock)
Reported-by: Michael Leun <ml@newton.leun.net>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
v2:
- register_syscore_ops(&s3c24xx_irq_syscore_ops) does not need to be
conditionally compiled out, it is already optimized out on !CONFIG_PM
- fix also s3c2412 and s3c2416 affected by the same build issue
v1:
s3c2440.c fails to build if !CONFIG_PM because in such case
s3c2410_pm_syscore_ops is not defined. Same error should happen also
in s3c2410.c and s3c2442.c
Signed-off-by: Domenico Andreoli <cavokz@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Offsets of the irq controller registers were calculated
correctly only for first GPIO bank. This patch fixes
calculation of the register offsets for all GPIO banks.
Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Matthew Wilcox
Shane Michael Matthews
Linus Torvalds
Takashi Iwai
Alasdair G Kergon
Domenico Andreoli
Nick Bowler
Marek Szyprowski