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ibmvstgt: Updated patch description once more.

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@2746 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2010-11-17 19:53:09 +00:00
parent 3e298c2e4e
commit 184fd83fc3
1 changed files with 8 additions and 25 deletions
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scripts/generate-kernel-patch
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@@ -588,24 +588,12 @@ because this patch dissociates ibmvstgt SRP sessions from a SCSI host
instance. Since the user space STGT driver ibmvio was the only user of
these attributes, that shouldn't be an issue.
Changes in ibmvstgt compared to the patch posted on October 2, 2010:
- The format of a SCSI INQUIRY response is now in the format expected by AIX.
- Aborting a SCSI command does no longer trigger an SRP credit leak.
- The flag SRP_RSP_FLAG_SNSVALID in an SRP_RSP information unit is now only
set when a response contains sense data and not when e.g. the response status
is BUSY and no sense data is sent back to the initiator.
- In ibmvstgt_init(), get_system_info() is now invoked before registering the
sysfs attributes that export the queried values.
- Avoid that ibmvstgt_release() triggers a NULL-pointer dereference when
invoked before a client has logged in.
- The second and subsequent SRP_LOGIN received from a client does no longer
trigger a BUG_ON() in process_login().
Changes in ibmvstgt compared to kernel 2.6.36:
- Added support for persistent reservations.
- Increased maximum data size for a single SRP command from 128 KB to 64 MB.
- Increased maximum data size for a single SRP command from 128 KB to 64 MB
such that an initiator is not forced to split large transfers into
multiple SCSI commands.
- The maximum RDMA transfer size supported by a single H_COPY_RDMA call is
queried at driver initiatlization time from the open firmware tree / larger
queried at driver initialization time from the open firmware tree / larger
transfers than 128 KB are now supported too.
- If DMA mapping fails while handling a READ or WRITE command, the offending
command is retried until the associated data has been transferred instead of
@@ -622,11 +610,6 @@ Changes in ibmvstgt compared to kernel 2.6.36:
unsigned * into const unsigned * such that a cast could be removed.
- Fixed all compiler and sparse warnings (C=2 CF=-D__CHECK_ENDIAN__).
Changes in libsrp compared to the patch posted on October 2, 2010:
- srp_direct_data() and srp_indirect_data(): Use the data length from
the SCSI CDB instead of the length from the SRP_CMD data descriptors. Also,
compute the correct data length even if dma_map == 0.
Changes in libsrp compared to kernel 2.6.36:
- Renamed vscsis_data_length() into srp_data_length() and exported
this function.
@@ -646,8 +629,6 @@ Changes in libsrp compared to kernel 2.6.36:
core.
- Fixed all compiler and sparse warnings (C=2 CF=-D__CHECK_ENDIAN__).
Note: ibmvstgt is the only user of libsrp.
Tests performed on a backport to kernel version 2.6.18 of this driver with a
Linux initiator system:
- Verified that the kernel module ibmvstgt loads and initializes successfully
@@ -661,10 +642,12 @@ Linux initiator system:
- Performed IO stress testing on the device.
- Verified that SCSI task abortion works correctly.
- Performed basic I/O performance testing. With a RAM disk as target linear
direct I/O throughput was above 2 GB/s and a 4 KB random I/O test resulted
in more than 10000 IOPS.
direct I/O throughput was above 2 GB/s and a random I/O test resulted in
about 30000 IOPS for all block sizes between 512 bytes and 16 KB.
Both initiator and target were dual core POWER6 LPAR systems.
Note: ibmvstgt is the only user of libsrp.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Fujita Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Brian King <brking@linux.vnet.ibm.com>