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Diffstat (limited to 'Documentation/scsi/lpfc.txt')
| -rw-r--r-- | Documentation/scsi/lpfc.txt | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/Documentation/scsi/lpfc.txt b/Documentation/scsi/lpfc.txt deleted file mode 100644 index 5741ea8aa88a..000000000000 --- a/Documentation/scsi/lpfc.txt +++ /dev/null @@ -1,83 +0,0 @@ - -LPFC Driver Release Notes: - -============================================================================= - - - IMPORTANT: - - Starting in the 8.0.17 release, the driver began to be targeted strictly - toward the upstream kernel. As such, we removed #ifdefs for older kernels - (pre 2.6.10). The 8.0.16 release should be used if the driver is to be - run on one of the older kernels. - - The proposed modifications to the transport layer for FC remote ports - and extended attribute support is now part of the upstream kernel - as of 2.6.12. We no longer need to provide patches for this support, - nor a *full* version which has old an new kernel support. - - The driver now requires a 2.6.12 (if pre-release, 2.6.12-rc1) or later - kernel. - - Please heed these dependencies.... - - - ******************************************************************** - - -The following information is provided for additional background on the -history of the driver as we push for upstream acceptance. - -Cable pull and temporary device Loss: - - In older revisions of the lpfc driver, the driver internally queued i/o - received from the midlayer. In the cases where a cable was pulled, link - jitter, or a device temporarily loses connectivity (due to its cable - being removed, a switch rebooting, or a device reboot), the driver could - hide the disappearance of the device from the midlayer. I/O's issued to - the LLDD would simply be queued for a short duration, allowing the device - to reappear or link come back alive, with no inadvertent side effects - to the system. If the driver did not hide these conditions, i/o would be - errored by the driver, the mid-layer would exhaust its retries, and the - device would be taken offline. Manual intervention would be required to - re-enable the device. - - The community supporting kernel.org has driven an effort to remove - internal queuing from all LLDDs. The philosophy is that internal - queuing is unnecessary as the block layer already performs the - queuing. Removing the queues from the LLDD makes a more predictable - and more simple LLDD. - - As a potential new addition to kernel.org, the 8.x driver was asked to - have all internal queuing removed. Emulex complied with this request. - In explaining the impacts of this change, Emulex has worked with the - community in modifying the behavior of the SCSI midlayer so that SCSI - devices can be temporarily suspended while transport events (such as - those described) can occur. - - The proposed patch was posted to the linux-scsi mailing list. The patch - is contained in the 2.6.10-rc2 (and later) patch kits. As such, this - patch is part of the standard 2.6.10 kernel. - - By default, the driver expects the patches for block/unblock interfaces - to be present in the kernel. No #define needs to be set to enable support. - - -Kernel Support - - This source package is targeted for the upstream kernel only. (See notes - at the top of this file). It relies on interfaces that are slowing - migrating into the kernel.org kernel. - - At this time, the driver requires the 2.6.12 (if pre-release, 2.6.12-rc1) - kernel. - - If a driver is needed for older kernels please utilize the 8.0.16 - driver sources. - - -Patches - - Thankfully, at this time, patches are not needed. - - |