This is a note to let you know that I've just added the patch titled megaraid_sas: use raw_smp_processor_id() to the 4.0-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: megaraid_sas-use-raw_smp_processor_id.patch and it can be found in the queue-4.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 16b8528d20607925899b1df93bfd8fbab98d267c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig <hch@xxxxxxxxxxxxx> Date: Wed, 15 Apr 2015 09:44:37 -0700 Subject: megaraid_sas: use raw_smp_processor_id() From: Christoph Hellwig <hch@xxxxxxxxxxxxx> commit 16b8528d20607925899b1df93bfd8fbab98d267c upstream. We only want to steer the I/O completion towards a queue, but don't actually access any per-CPU data, so the raw_ version is fine to use and avoids the warnings when using smp_processor_id(). Signed-off-by: Christoph Hellwig <hch@xxxxxx> Reported-by: Andy Lutomirski <luto@xxxxxxxxxx> Tested-by: Andy Lutomirski <luto@xxxxxxxxxx> Acked-by: Sumit Saxena <sumit.saxena@xxxxxxxxxxxxx> Signed-off-by: James Bottomley <JBottomley@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/megaraid/megaraid_sas_fusion.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -1584,11 +1584,11 @@ megasas_build_ldio_fusion(struct megasas fp_possible = io_info.fpOkForIo; } - /* Use smp_processor_id() for now until cmd->request->cpu is CPU + /* Use raw_smp_processor_id() for now until cmd->request->cpu is CPU id by default, not CPU group id, otherwise all MSI-X queues won't be utilized */ cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ? - smp_processor_id() % instance->msix_vectors : 0; + raw_smp_processor_id() % instance->msix_vectors : 0; if (fp_possible) { megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp, @@ -1693,7 +1693,10 @@ megasas_build_dcdb_fusion(struct megasas << MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT; cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle; cmd->request_desc->SCSIIO.MSIxIndex = - instance->msix_vectors ? smp_processor_id() % instance->msix_vectors : 0; + instance->msix_vectors ? + raw_smp_processor_id() % + instance->msix_vectors : + 0; os_timeout_value = scmd->request->timeout / HZ; if (instance->secure_jbod_support && Patches currently in stable-queue which might be from hch@xxxxxxxxxxxxx are queue-4.0/megaraid_sas-use-raw_smp_processor_id.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html