https://bugs.dpdk.org/show_bug.cgi?id=447
Bug ID: 447
Summary: ixgbe: ixgbe_dev_link_update_share() leaks memory and
memory mappings due to not cleaning up pthreads
Product: DPDK
Version: 20.02
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: major
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: martin.wei...@allegro-packets.com
Target Milestone: ---
In the patch "net/ixgbe: fix blocking system events"
(819d0d1d57f17aa40321648e99a50b49adc7bdf6) a thread is introduced to
run ixgbe_dev_setup_link_thread_handler().
Unfortunately this thread is not detached and just joined (the very
last one spawned that is) through ixgbe_dev_cancel_link_thread() upon
interface start/stop.
When an application repeatedly calls e.g. rte_eth_link_get_nowait() on
an ixgbe interface with no link this causes a lot of pthreads never to
be cleaned up.
Since each thread holds a mmap to the stack this can quite quickly
exhaust the allowed number of memory mappings for the process.
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