Roopa Prabhu d297653dd6 rtnetlink: fdb dump: optimize by saving last interface markers ... fdb dumps spanning multiple skb's currently restart from the first interface again for every skb. This results in unnecessary iterations on the already visited interfaces and their fdb entries. In large scale setups, we have seen this to slow down fdb dumps considerably. On a system with 30k macs we see fdb dumps spanning across more than 300 skbs. To fix the problem, this patch replaces the existing single fdb marker with three markers: netdev hash entries, netdevs and fdb index to continue where we left off instead of restarting from the first netdev. This is consistent with link dumps. In the process of fixing the performance issue, this patch also re-implements fix done by commit 472681d57a ("net: ndo_fdb_dump should report -EMSGSIZE to rtnl_fdb_dump") (with an internal fix from Wilson Kok) in the following ways: - change ndo_fdb_dump handlers to return error code instead of the last fdb index - use cb->args strictly for dump frag markers and not error codes. This is consistent with other dump functions. Below results were taken on a system with 1000 netdevs and 35085 fdb entries: before patch: $time bridge fdb show | wc -l 15065 real 1m11.791s user 0m0.070s sys 1m8.395s (existing code does not return all macs) after patch: $time bridge fdb show | wc -l 35085 real 0m2.017s user 0m0.113s sys 0m1.942s Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-09-01 16:56:15 -07:00
..
Makefile	net: ethernet: qlogic: qlcnic: Remove duplicate object file from Makefile	2014-08-11 12:44:35 -07:00
qlcnic_83xx_hw.c	net: qlcnic: don't set unused function argument	2016-06-16 17:33:11 -07:00
qlcnic_83xx_hw.h	qlcnic: Add support to enable capability to extend minidump for iSCSI	2015-08-10 13:34:28 -07:00
qlcnic_83xx_init.c	qlcnic: Replace ndo_add/del_vxlan_port with ndo_add/del_udp_enc_port	2016-06-17 20:23:31 -07:00
qlcnic_83xx_vnic.c	qlcnic: fix a loop exit condition better	2015-12-24 11:02:35 -05:00
qlcnic_ctx.c	qlcnic: correctly handle qlcnic_alloc_mbx_args	2016-01-04 17:14:30 -05:00
qlcnic_dcb.c	qlcnic: constify qlcnic_dcb_ops structures	2015-12-28 00:44:52 -05:00
qlcnic_dcb.h	net: qlcnic: avoid superfluous assignement	2016-08-01 13:47:00 -07:00
qlcnic_ethtool.c	qlcnic: Fix mailbox completion handling during spurious interrupt	2016-03-10 16:15:54 -05:00
qlcnic_hdr.h
qlcnic_hw.c	qlcnic: Rearrange ordering of header files inclusion	2015-08-10 13:34:28 -07:00
qlcnic_hw.h	qlcnic: Add support to enable capability to extend minidump for iSCSI	2015-08-10 13:34:28 -07:00
qlcnic_init.c	qlcnic: Use usleep_range() instead of msleep() for sleep less than 20ms	2014-08-29 20:15:36 -07:00
qlcnic_io.c	qlcnic: fix napi budget alteration	2016-08-03 12:03:35 -07:00
qlcnic_main.c	rtnetlink: fdb dump: optimize by saving last interface markers	2016-09-01 16:56:15 -07:00
qlcnic_minidump.c	qlcnic: potential NULL dereference in qlcnic_83xx_get_minidump_template()	2016-05-11 23:44:56 -04:00
qlcnic_sriov_common.c	qlcnic: fix data structure corruption in async mbx command handling	2016-08-03 12:03:35 -07:00
qlcnic_sriov_pf.c	qlcnic: Rearrange ordering of header files inclusion	2015-08-10 13:34:28 -07:00
qlcnic_sriov.h	qlcnic: fix data structure corruption in async mbx command handling	2016-08-03 12:03:35 -07:00
qlcnic_sysfs.c	qlcnic: Rearrange ordering of header files inclusion	2015-08-10 13:34:28 -07:00
qlcnic.h	qlcnic: Update version to 5.3.65	2016-08-03 12:03:35 -07:00