On 12/14/2015 07:10 AM, Jitendra Bhivare wrote:
From: Jitendra <jitendra.bhivare@xxxxxxxxxxxxx>
We are taking mbox_lock spinlock which disables pre-emption before we poll
for mbox completion. Waiting there with spinlock held in excess of 20s will
cause soft lockup.
Actual fix is to change mbox_lock to mutex.
Really? I didn't find that in the patch ...
The changes are done in phases. This is the first part.
1. Changed mgmt_get_all_if_id to use MCC instead of BMBX.
2. Changed be_mbox_db_ready_wait to busy wait for 12s max and removed
wait_event_timeout. Added error handling code for IO reads.
OPCODE_COMMON_QUERY_FIRMWARE_CONFIG mbox command takes 8s time when
unreachable boot targets are configured.
Why did you modify be_mbox_db_ready_wait(), seeing that you're not
using the mailbox interface anymore after this change?
Cheers,
Hannes
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Dr. Hannes Reinecke zSeries & Storage
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