Red Hat Bugzilla – Bug 506151
RHEL5.4: cxgb3i (open-iscsi) update
Last modified: 2010-10-18 12:56:40 EDT
Description of problem:
I am opening this bug to submit a patch series against 2.6.18-153.
There are two patches in the series:
1. cxgb3i -- use kref to track ddp usage
The iscsi ddp functionality could be used by multiple iscsi entities.
This patch add a refcnt to keep track of it, so we would not release
the ddp table pre-maturely. Without this patch, the ddp could be
disabled in the middle of a scsi read transaction, and the data then
would have to be copied into the scsi buffer.
2. cxgb3i -- suppot of different kernel page sizes
The default kernel pages supported are 4K, 8K, 16K, and 64K.
If PAGE_SIZE is not one of the defaults, re-calculate ddp page table
entries (so that we would reprogrammed the h/w when initializing ddp).
Without this patch, the ddp functionality would be disabled if the
PAGE_SIZE is not one of the defaults.
Created attachment 347983 [details]
506151: cxgb3i add kref
Created attachment 347985 [details]
cxgb3i patch tar ball
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
You can download this test kernel from http://people.redhat.com/dzickus/el5
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described in this bug report. This report is therefore being
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