[dpdk-dev] [PATCH v6 00/26] linux/eal: Remove most causes of panic on init

[Aaron Conole]

From: Aaron Conole <aconole at bytheb.org>

In many cases, it's enough to simply let the application know that the
call to initialize DPDK has failed.  A complete halt can then be
decided by the application based on error returned (and the app could
even attempt a possible re-attempt after some corrective action by the
user or application).

Changes ->v2:
- Audited all "RTE_LOG (" calls that were introduced, and converted
  to "RTE_LOG("
- Added some fprintf(stderr, "") lines to indicate errors before logging
  is initialized
- Removed assignments to errno.
- Changed patch 14/25 to reflect EFAULT, and document in 25/25

Changes ->v3:
- Checkpatch issues in patches 3 (spelling mistake), 9 (issue with leading
  spaces), and 19 (braces around single line statement if-condition)

Changes ->v4:
- Error text cleanup.
- Add a new check around rte_bus_scan(), added during the development of
  this series.

Changes ->v5:
- checkpatch.pl cleanup in patch 02/26
- move rte_errno.h include from patch 15 to patch 02
- remove stdbool.h and use int as return type in patch 06/26

Changes ->v6:
- convert all of the initialization calls to RTE_LOG() to rte_eal_init_alert()
- run through check-git-log and checkpatches
- add Bruce's ack to the series

I kept the rte_errno reflection, since this is control-path code and the
init function returns a sentinel value of -1.

Aaron Conole (26):
  eal: cpu init will no longer panic
  eal: return error instead of panic for cpu init
  eal: do not panic on hugepage info init
  eal: do not panic on failed hugepage query
  eal: do not panic if parsing args returns error
  eal-common: introduce a way to query cpu support
  eal: do not panic when CPU isn't supported
  eal: do not panic on memzone initialization fails
  eal: set errno when exiting for already called
  eal: do not panic on log failures
  eal: do not panic on PCI-probe
  eal: do not panic on vfio failure
  eal: do not panic on memory init
  eal: do not panic on tailq init
  eal: do not panic on alarm init
  eal: convert timer init not to call panic
  eal: change the private pipe call to reflect errno
  eal: do not panic on interrupt thread init
  eal: do not error if plugins fail to init
  eal_pci: continue probing even on failures
  eal: do not panic on failed PCI-probe
  eal_common_dev: continue initializing vdevs
  eal: do not panic (or abort) if vdev init fails
  eal: do not panic when bus probe fails
  eal: do not panic on failed bus scan
  rte_eal_init: add info about various error codes

 lib/librte_eal/common/eal_common_cpuflags.c        |  13 +-
 lib/librte_eal/common/eal_common_dev.c             |   5 +-
 lib/librte_eal/common/eal_common_lcore.c           |   7 +-
 lib/librte_eal/common/eal_common_pci.c             |  15 ++-
 lib/librte_eal/common/eal_common_tailqs.c          |   3 +-
 .../common/include/generic/rte_cpuflags.h          |   8 ++
 lib/librte_eal/common/include/rte_eal.h            |  27 ++++-
 lib/librte_eal/linuxapp/eal/eal.c                  | 131 +++++++++++++++------
 lib/librte_eal/linuxapp/eal/eal_hugepage_info.c    |   9 +-
 lib/librte_eal/linuxapp/eal/eal_interrupts.c       |   5 +-
 10 files changed, 170 insertions(+), 53 deletions(-)

-- 
2.9.3