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authorMike Marciniszyn2013-02-26 15:46:27 +0000
committerRoland Dreier2013-03-22 18:01:04 -0700
commit1ee9e2aa7b31427303466776f455d43e5e3c9275 (patch)
tree01026c06a9b3adc0d0b8f9f4349a24f9041ce8c9 /drivers/gpio
parenta937536b868b8369b98967929045f1df54234323 (diff)
IPoIB: Fix send lockup due to missed TX completion
Commit f0dc117abdfa ("IPoIB: Fix TX queue lockup with mixed UD/CM traffic") attempts to solve an issue where unprocessed UD send completions can deadlock the netdev. The patch doesn't fully resolve the issue because if more than half the tx_outstanding's were UD and all of the destinations are RC reachable, arming the CQ doesn't solve the issue. This patch uses the IB_CQ_REPORT_MISSED_EVENTS on the ib_req_notify_cq(). If the rc is above 0, the UD send cq completion callback is called directly to re-arm the send completion timer. This issue is seen in very large parallel filesystem deployments and the patch has been shown to correct the issue. Cc: <stable@vger.kernel.org> Reviewed-by: Dean Luick <dean.luick@intel.com> Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/gpio')
0 files changed, 0 insertions, 0 deletions