AuxXxilium/linux_dsm_epyc7002
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584d9577ff
linux_dsm_epyc7002/drivers/infiniband/hw/hfi1
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Tadeusz Struk 584d9577ff IB/hfi1: Fix locking scheme for affinity settings 
Existing locking scheme in affinity.c file using the
&node_affinity.lock spinlock is not very elegant.
We acquire the lock to get hfi1_affinity_node entry,
unlock, and then use the entry without the lock held.
With more functions being added, which access and
modify the entries, this can lead to race conditions.
This patch makes this locking scheme more consistent.
It changes the spinlock to mutex. Since all the code
is executed in a user process context there is no need
for a spinlock. This also allows to keep the lock
not only while we look up for the node affinity entry,
but over the whole section where the entry is being used.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Reviewed-by: Jianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-10-02 08:42:08 -04:00
..
affinity.c IB/hfi1: Fix locking scheme for affinity settings 2016-10-02 08:42:08 -04:00
affinity.h IB/hfi1: Fix locking scheme for affinity settings 2016-10-02 08:42:08 -04:00
aspm.h
chip_registers.h IB/hfi1: Read all firmware versions 2016-08-02 16:00:58 -04:00
chip.c IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
chip.h IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
common.h IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
debugfs.c IB/hfi1: Rework debugfs to use SRCU 2016-09-02 14:26:55 -04:00
debugfs.h
device.c
device.h
dma.c
driver.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
efivar.c
efivar.h
eprom.c
eprom.h
file_ops.c IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
firmware.c IB/hfi1: Read all firmware versions 2016-08-02 16:00:58 -04:00
hfi.h IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
init.c IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
intr.c
iowait.h
Kconfig Second round of merge items for 4.8 2016-08-04 20:26:31 -04:00
mad.c IB/hfi1: Move serdes tune inside link start function 2016-10-02 08:42:06 -04:00
mad.h IB/hfi1: Clean up port state structure definition 2016-08-02 12:00:54 -04:00
Makefile IB/hfi1: Remove TWSI references 2016-08-02 15:47:42 -04:00
mmu_rb.c IB/hfi1: Add cache evict LRU list 2016-08-02 22:46:21 -04:00
mmu_rb.h IB/hfi1: Remove unneeded mm argument in remove function 2016-08-02 22:46:21 -04:00
opa_compat.h
pcie.c IB/hfi1: Add static PCIe Gen3 CTLE tuning 2016-08-02 16:00:58 -04:00
pio_copy.c IB/hfi1: Fix SGE length for misaligned PIO copy 2016-09-02 14:26:55 -04:00
pio.c IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
pio.h IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
platform.c IB/hfi1: Reset QSFP on every run through channel tuning 2016-08-02 16:00:58 -04:00
platform.h
qp.c IB/rdmavt, IB/qib, IB/hfi1: Use new QP put get routines 2016-09-16 14:35:27 -04:00
qp.h IB/hfi1: Rename struct ahg_ib_header to struct hfi1_ahg_info 2016-08-02 16:00:58 -04:00
qsfp.c IB/hfi1: Fetch monitor values on-demand for CableInfo query 2016-08-22 14:31:41 -04:00
qsfp.h IB/hfi1: Fetch monitor values on-demand for CableInfo query 2016-08-22 14:31:41 -04:00
rc.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
ruc.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
sdma_txreq.h
sdma.c IB/hfi1: Fix the count of user packets submitted to an SDMA engine 2016-10-02 08:42:07 -04:00
sdma.h IB/hfi1: Fix the count of user packets submitted to an SDMA engine 2016-10-02 08:42:07 -04:00
sysfs.c IB/hfi1: Add sysfs entry to override SDMA interrupt affinity 2016-08-02 16:00:58 -04:00
trace_ctxts.h IB/hfi1: Fix user-space buffers mapping with IOMMU enabled 2016-10-02 08:42:07 -04:00
trace_dbg.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_ibhdrs.h IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
trace_misc.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_rc.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
trace_rx.h IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
trace_tx.h IB/hfi1: Fix trace sparse errors 2016-08-02 12:00:54 -04:00
trace.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
trace.h IB/hfi1: Separate tracepoints into specific headers 2016-08-02 12:00:54 -04:00
uc.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
ud.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
user_exp_rcv.c IB/hfi1: Fix memory leak during unexpected shutdown 2016-08-02 22:46:21 -04:00
user_exp_rcv.h
user_pages.c IB/hfi1: Make use of mm consistent 2016-08-02 22:46:21 -04:00
user_sdma.c IB/hfi1: Fix the count of user packets submitted to an SDMA engine 2016-10-02 08:42:07 -04:00
user_sdma.h IB/hfi1: Use evict mmu rb operation 2016-08-02 22:46:21 -04:00
verbs_txreq.c IB/rdmavt, IB/qib, IB/hfi1: Use new QP put get routines 2016-09-16 14:35:27 -04:00
verbs_txreq.h IB/hfi1: Rename hfi1_pio_header to hfi1_sdma_header. 2016-08-02 16:00:58 -04:00
verbs.c IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00
verbs.h IB/qib,IB/hfi: Use core common header file 2016-10-02 08:42:06 -04:00