DPDK patches and discussions
 help / color / mirror / Atom feed
From: Adrien Mazarguil <adrien.mazarguil@6wind.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH v2 06/23] mlx4: allow applications to partially use fork()
Date: Tue, 30 Jun 2015 11:27:52 +0200	[thread overview]
Message-ID: <1435656489-27986-7-git-send-email-adrien.mazarguil@6wind.com> (raw)
In-Reply-To: <1435656489-27986-1-git-send-email-adrien.mazarguil@6wind.com>

From: Olga Shern <olgas@mellanox.com>

Although using the PMD from a forked process is still unsupported, this
commit makes Verbs safe enough for applications to call fork() for other
purposes.

Signed-off-by: Olga Shern <olgas@mellanox.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---
 drivers/net/mlx4/mlx4.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 8be1574..ed68beb 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -4686,6 +4686,14 @@ rte_mlx4_pmd_init(const char *name, const char *args)
 {
 	(void)name;
 	(void)args;
+	/*
+	 * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
+	 * huge pages. Calling ibv_fork_init() during init allows
+	 * applications to use fork() safely for purposes other than
+	 * using this PMD, which is not supported in forked processes.
+	 */
+	setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
+	ibv_fork_init();
 	rte_eal_pci_register(&mlx4_driver.pci_drv);
 	return 0;
 }
-- 
2.1.0

  parent reply	other threads:[~2015-06-30  9:28 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-05 23:15 [dpdk-dev] [PATCH 00/16] mlx4: MOFED 3.0 support, bugfixes and enhancements Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 01/16] mlx4: add MOFED 3.0 compatibility to interfaces names retrieval Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 02/16] mlx4: use experimental verbs for polling and completions Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 03/16] mlx4: make sure experimental device query function is implemented Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 04/16] mlx4: add L3 and L4 RX checksum offload support Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 05/16] mlx4: add L2 tunnel (VXLAN) " Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 06/16] mlx4: use faster CQ polling function Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 07/16] mlx4: update optimized steering warning message Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 08/16] mlx4: avoid looking up WR ID to improve RX performance Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 09/16] mlx4: merge RX queue setup functions Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 10/16] mlx4: allow applications to use fork() safely Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 11/16] mlx4: improve accuracy of link status information Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 12/16] mlx4: add support for upstream flow steering API Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 13/16] mlx4: fix error message for invalid number of descriptors Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 14/16] mlx4: remove provision for flow creation failure in DMFS A0 mode Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 15/16] mlx4: fix support for multiple VLAN filters Adrien Mazarguil
2015-06-05 23:15 ` [dpdk-dev] [PATCH 16/16] mlx4: query netdevice to get initial MAC address Adrien Mazarguil
2015-06-30  9:27 ` [dpdk-dev] [PATCH v2 00/23] mlx4: MOFED 3.0 support, bugfixes and enhancements Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 01/23] mlx4: fix possible crash on scattered mbuf allocation failure Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 02/23] mlx4: add MOFED 3.0 compatibility to interfaces names retrieval Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 03/23] mlx4: make sure experimental device query function is implemented Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 04/23] mlx4: avoid looking up WR ID to improve RX performance Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 05/23] mlx4: merge RX queue setup functions Adrien Mazarguil
2015-06-30  9:27   ` Adrien Mazarguil [this message]
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 07/23] mlx4: improve accuracy of link status information Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 08/23] mlx4: use MOFED 3.0 extended flow steering API Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 09/23] mlx4: fix error message for invalid number of descriptors Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 10/23] mlx4: remove provision for flow creation failure in DMFS A0 mode Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 11/23] mlx4: fix support for multiple VLAN filters Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 12/23] mlx4: query netdevice to get initial MAC address Adrien Mazarguil
2015-06-30  9:27   ` [dpdk-dev] [PATCH v2 13/23] mlx4: use MOFED 3.0 fast verbs interface for RX operations Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 14/23] mlx4: improve performance by requesting TX completion events less often Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 15/23] mlx4: use MOFED 3.0 fast verbs interface for TX operations Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 16/23] mlx4: move scattered TX processing to helper function Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 17/23] mlx4: shrink TX queue elements for better performance Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 18/23] mlx4: prefetch completed TX mbufs before releasing them Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 19/23] mlx4: add L3 and L4 checksum offload support Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 20/23] mlx4: add L2 tunnel (VXLAN) " Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 21/23] mlx4: associate resource domain with CQs and QPs to enhance performance Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 22/23] mlx4: disable multicast echo when device is not VF Adrien Mazarguil
2015-06-30  9:28   ` [dpdk-dev] [PATCH v2 23/23] doc: update mlx4 documentation following MOFED 3.0 changes Adrien Mazarguil
2015-07-01  9:33   ` [dpdk-dev] [PATCH v2 00/23] mlx4: MOFED 3.0 support, bugfixes and enhancements Thomas Monjalon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1435656489-27986-7-git-send-email-adrien.mazarguil@6wind.com \
    --to=adrien.mazarguil@6wind.com \
    --cc=dev@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).