patches for DPDK stable branches
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From: Kevin Traynor <ktraynor@redhat.com>
To: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
Cc: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
	dpdk stable <stable@dpdk.org>
Subject: [dpdk-stable] patch 'timer: add limitation note for sync stop and reset' has been queued to LTS release 18.11.11
Date: Thu,  5 Nov 2020 12:39:55 +0000
Message-ID: <20201105124015.306404-48-ktraynor@redhat.com> (raw)
In-Reply-To: <20201105124015.306404-1-ktraynor@redhat.com>

Hi,

FYI, your patch has been queued to LTS release 18.11.11

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/10/20. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable-queue

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable-queue/commit/71605786253853b3363e181c780e35a3744e0f5d

Thanks.

Kevin.

---
From 71605786253853b3363e181c780e35a3744e0f5d Mon Sep 17 00:00:00 2001
From: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
Date: Wed, 9 Sep 2020 09:41:14 -0500
Subject: [PATCH] timer: add limitation note for sync stop and reset

[ upstream commit 0875ec4dd55a548a1f8a27674b1c136c0800d73d ]

If a timer's callback function calls rte_timer_reset_sync() or
rte_timer_stop_sync() on another timer that is in the RUNNING state and
owned by the current lcore, the *_sync() calls will loop indefinitely.

Relatedly, if a timer's callback function calls *_sync() on another
timer that is in the RUNNING state and is owned by a different lcore,
but a timer callback function runs on that different lcore and calls
*_sync() on a timer that is in the RUNNING state and owned by the
current lcore, the two lcores will loop indefinitely.

Add a note in the rte_timer_stop_sync and rte_timer_reset_sync
documentation that indicates that these APIs should not be used inside
timer callback functions in order to avoid the hangs described above,
and suggests an alternative.

Bugzilla ID: 491

Signed-off-by: Erik Gabriel Carrillo <erik.g.carrillo@intel.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
---
 lib/librte_timer/rte_timer.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/librte_timer/rte_timer.h b/lib/librte_timer/rte_timer.h
index 9b95cd2c98..d3b06bc8e8 100644
--- a/lib/librte_timer/rte_timer.h
+++ b/lib/librte_timer/rte_timer.h
@@ -224,4 +224,10 @@ int rte_timer_reset(struct rte_timer *tim, uint64_t ticks,
  * @param arg
  *   The user argument of the callback function.
+ *
+ * @note
+ *   This API should not be called inside a timer's callback function to
+ *   reset another timer; doing so could hang in certain scenarios. Instead,
+ *   the rte_timer_reset() API can be called directly and its return code
+ *   can be checked for success or failure.
  */
 void
@@ -264,4 +270,10 @@ int rte_timer_stop(struct rte_timer *tim);
  * @param tim
  *   The timer handle.
+ *
+ * @note
+ *   This API should not be called inside a timer's callback function to
+ *   stop another timer; doing so could hang in certain scenarios. Instead, the
+ *   rte_timer_stop() API can be called directly and its return code can
+ *   be checked for success or failure.
  */
 void rte_timer_stop_sync(struct rte_timer *tim);
-- 
2.26.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2020-11-05 12:38:55.157265677 +0000
+++ 0048-timer-add-limitation-note-for-sync-stop-and-reset.patch	2020-11-05 12:38:54.246896024 +0000
@@ -1 +1 @@
-From 0875ec4dd55a548a1f8a27674b1c136c0800d73d Mon Sep 17 00:00:00 2001
+From 71605786253853b3363e181c780e35a3744e0f5d Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 0875ec4dd55a548a1f8a27674b1c136c0800d73d ]
+
@@ -22 +23,0 @@
-Cc: stable@dpdk.org
@@ -31 +32 @@
-index 7af83783b0..22a27aa08d 100644
+index 9b95cd2c98..d3b06bc8e8 100644
@@ -34 +35 @@
-@@ -263,4 +263,10 @@ int rte_timer_reset(struct rte_timer *tim, uint64_t ticks,
+@@ -224,4 +224,10 @@ int rte_timer_reset(struct rte_timer *tim, uint64_t ticks,
@@ -45 +46 @@
-@@ -302,4 +308,10 @@ int rte_timer_stop(struct rte_timer *tim);
+@@ -264,4 +270,10 @@ int rte_timer_stop(struct rte_timer *tim);


  parent reply	other threads:[~2020-11-05 12:42 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-05 12:39 [dpdk-stable] patch 'bus/pci: remove duplicate declaration' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/failsafe: fix double space in warning log' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/netvsc: fix multiple channel Rx' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/netvsc: fix stale value after free' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/mlx5: remove unused log macros' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/bnxt: fix endianness while setting L4 destination port' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/iavf: downgrade error log' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'ethdev: remove redundant license text' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/i40e/base: fix function header arguments' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/i40e/base: fix Rx only for unicast promisc on VLAN' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/tap: free mempool when closing' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/dpaa2: fix misuse of interface index' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/cxgbe: fix duplicate MAC addresses in MPS TCAM' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/nfp: expand device info get' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: fix name of bitrate library in meson build' " Kevin Traynor
2020-11-05 13:22   ` David Marchand
2020-11-11 10:44     ` Kevin Traynor
2020-11-11 10:50       ` Kevin Traynor
2020-11-11 11:51         ` Luca Boccassi
2020-11-05 12:39 ` [dpdk-stable] patch 'gso: fix payload unit size for UDP' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'doc: improve multiport PF in nfp guide' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/sfc/base: fix tunnel configuration' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'vhost: fix IOTLB mempool single-consumer flag' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/qede: fix milliseconds sleep macro' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/ena/base: use min/max macros with type conversion' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/ena/base: specify delay operations' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/ena/base: fix release of wait event' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/i40e: fix byte counters' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/ixgbe: fix VF reset HW error handling' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/bnxt: fix shift operation' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/bnxt: fix queue get info' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'mempool/octeontx: fix aura to pool mapping' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/fm10k: fix memory leak when thresh check fails' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: fix port id check in Tx VLAN command' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: fix VLAN configuration on failure' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: remove restriction on Tx segments set' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: fix descriptor id check' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: fix displaying Rx/Tx queues information' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/qede: fix dereference before null check' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'app: fix ethdev port id size' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'doc: " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'vdpa/ifc: fix build with recent kernels' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'vfio: fix group descriptor check' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'bus/pci: fix memory leak when unmapping VFIO resource' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'bus/pci: fix leak on VFIO mapping error' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'doc: fix formatting of notes in meson guide' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'mem: fix allocation in container with SELinux' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'bus/fslmc: fix dpio close' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'raw/skeleton: reset test statistics' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'raw/skeleton: allow closing already closed device' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'port: remove useless assignment' " Kevin Traynor
2020-11-05 12:39 ` Kevin Traynor [this message]
2020-11-05 12:39 ` [dpdk-stable] patch 'app/testpmd: fix build with gcc 11' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'pmdinfogen: " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/mlx5: fix Rx queue count calculation' " Kevin Traynor
2020-11-05 12:39 ` [dpdk-stable] patch 'net/qede: fix getting link details' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'net/fm10k: fix memory leak when Tx thresh check fails' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'raw/dpaa2_qdma: fix reset' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'eal: fix doxygen for EAL cleanup' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'build: skip detecting libpcap via pcap-config' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'doc: fix diagram in dpaa2 guide' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'net: check segment pointer in raw checksum processing' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'net/virtio: check raw checksum failure' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'mem: fix allocation failure on non-NUMA kernel' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'doc: fix missing classify methods in ACL guide' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'table: fix hash for 32-bit' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'test/crypto: fix device number' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'test/crypto: fix stats test' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'cryptodev: fix parameter parsing' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'crypto/dpaa2_sec: fix stats query without queue pair' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'net/avf: fix scattered Rx enabling' " Kevin Traynor
2020-11-05 12:40 ` [dpdk-stable] patch 'net/avf: fix iterator for RSS LUT' " Kevin Traynor

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