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Prior commit 4fa507992f0a ("scsi: libiscsi: Fix locking in
__iscsi_conn_send_pdu") changed back_lock to be taken/released with
spin_(un)lock rather than spin_(un)lock_bh in __iscsi_conn_send_pdu.
The usage of taskqueuelock in __iscsi_conn_send_pdu has the same issue
and the same argument for the sa
Hello All,
I've been trying to track down the cause of some soft lockups with
call traces involving the iscsi initiator. I believe I have found a
locking error in __iscsi_conn_send_pdu that is responsible.
A previous commit (4fa507992f0a ("scsi: libiscsi: Fix locking in
__iscsi_conn_send_pdu") c
As a staging cleanup to support transport specific builds of the cxlflash
module, relocate device dependent assignments to header files. This will
avoid littering the core driver with conditional compilation logic.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/main.c | 7 ++-
driver
Depending on the underlying transport, cxlflash has a dependency on either
the CXL or OCXL drivers, which are enabled via their Kconfig option.
Instead of having a module wide dependency on these config options, it is
better to isolate the object modules that are dependent on the CXL and OCXL
drive
The new header file, backend.h, that was recently added is missing
the include guards. This commit adds the guards.
Signed-off-by: Uma Krishnan
---
drivers/scsi/cxlflash/backend.h | 5 +
1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/cxlflash/backend.h b/drivers/scsi/cxlflash/bac
From: "Matthew R. Ochs"
AFUs can only process a single AFU command at a time. This is enforced
with a global mutex situated within the AFU send routine. As this mutex
has a global scope, it has the potential to unnecessarily block commands
destined for other AFUs.
Instead of using a global mutex
When a superpipe process that makes use of virtual LUNs is terminated or
killed abruptly, there is a possibility that the cxlflash driver could
hang and deprive other operations on the adapter.
The release fop registered to be invoked on a context close, detaches
every LUN associated with the cont
The kernel log can get filled with debug messages from send_cmd_ioarrin()
when dynamic debug is enabled for the cxlflash module and there is a lot
of legacy I/O traffic.
While these messages are necessary to debug issues that involve command
tracking, the abundance of data can overwrite other usef
The following Oops may be encountered if the device is reset, i.e. EEH
recovery, while there is heavy I/O traffic:
59:mon> t
[c000200db64bb680] c00809264c40 cxlflash_queuecommand+0x3b8/0x500
[cxlflash]
[c000200db64bb770] c090d3b0 scsi_dispatch_cm
This patch series adds few improvements to the cxlflash driver and
it also contains couple of bug fixes.
This patch series is intended for 4.18 and is bisectable.
Matthew R. Ochs (1):
cxlflash: Use local mutex for AFU serialization
Uma Krishnan (6):
cxlflash: Yield to active send threads
c
When a tape drive is exported via LIO using the pscsi module, a read that
requests more bytes per block than the tape can supply returns an empty
buffer. This is because the pscsi pass-through target module sees the
"ILI" illegal length bit set and thinks there is no reason to return
the data.
Thi
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