kernel-packages team mailing list archive

[Bryan Quigley <bryan.quigley@xxxxxxxxxxxxx>]

@kashyap-desai thanks for that, it could be a simple firmware reporting issue or the kernel code needs to be updated to handle a new case.
megaraid_sas_base.c [1] mentions that it generates the max_sectors limits from data provided from the firmware.
4096 is defined in a few other places within the driver [2] so I'm guessing other megaraids do support 4096?

Testing on non-powerpc would still be useful as would reverting to a
released firmware to see if max_sectors changes or the error changes.

[1] /*
	 * Compute the max allowed sectors per IO: The controller info has two
	 * limits on max sectors. Driver should use the minimum of these two.
	 *
	 * 1 << stripe_sz_ops.min = max sectors per strip
	 *
	 * Note that older firmwares ( < FW ver 30) didn't report information
	 * to calculate max_sectors_1. So the number ended up as zero always.
	 */
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/megaraid/megaraid_sas_base.c
[2] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/scsi/megaraid.h

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https://bugs.launchpad.net/bugs/1475166

Title:
  Ubuntu 15.04 Install Error with Avago Controller

Status in linux package in Ubuntu:
  Triaged

Bug description:
  Hello Canonical Team

  We are running to an issue installing ubuntu PPC64LE 15.04 full blown
  image on our servers  (with RAID controller).  Installation hangs
  around 70% of progress.

  An important part of our configuration is Avago RAID controller:
  9361-8i Firmware version we used is 4.300.00-4429, and the package is
  24.10.0-0002.

  IMPORTANT: It has to be noted that with same hardware configuration
  14.10 full blown image installs fine.

  Dmesg logs are attached:

  Looking at dmesg logs point out that:
  LSI (avago) driver loads fine
  During further interaction with raid volume during the installation process, firmware errors are seen 
  [  196.991417] megasas: FW status 0x3

  [  196.999376] megasas: FW status 0x3

  [  197.007376] megasas: FW status 0x3
  Further down the  process I/O errors are thrown
  [  217.438664] Buffer I/O error on device sda2, logical block 22052864

  [  217.438671] Buffer I/O error on device sda2, logical block 22052865

  [  217.438678] Buffer I/O error on device sda2, logical block 22052866

  [  217.438686] Buffer I/O error on device sda2, logical block 22052867

  Full dmesg log is attached. Snippet is pasted below highlighting:

  It can be noted that there’s a Mellanox Connectx 3 pro card with some test Firmware on our setup. 
  We can Ignore any diagnostic messages from that card in dmesg logs for the purpose of this bug. 

  Thanks
  Adi Gangidi

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