From: Thomas Monjalon <thomas@monjalon.net>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Bruce Richardson <bruce.richardson@intel.com>,
dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] pci: fix missing pci bus with shared library build
Date: Mon, 22 Jul 2019 19:04:55 +0200 [thread overview]
Message-ID: <3107061.JzsCpgzbfO@xps> (raw)
In-Reply-To: <20190722094323.613cb090@xps13>
22/07/2019 18:43, Stephen Hemminger:
> On Mon, 22 Jul 2019 10:06:11 +0100
> Bruce Richardson <bruce.richardson@intel.com> wrote:
> > On Mon, Jul 22, 2019 at 09:38:27AM +0200, Thomas Monjalon wrote:
> > > 19/07/2019 22:55, Stephen Hemminger:
> > > > The root cause is that recent gcc won't run constructor on unused libraries.
> > > > Testing a patch to take --as-needed off of PCI library.
> > > >
> > > > See: https://stackoverflow.com/questions/11631161/force-to-link-against-unused-shared-library
> > >
> > > The constructor is run when calling dlopen, right?
> > >
> > > Note: dlopen with -d is a feature.
> > > The original idea was to be able to specify which driver we want to use.
> > > If we want an automatic dlopen, like modprobe, then we need more scripts.
> > > But I understand you are against the whole dlopen idea.
> >
> > This issue is more of a problem for development systems where we EAL path
> > is not really usable for finding the drivers. For a properly deployed
> > system where we use DPDK installed to /usr/local or /usr, the EAL PMD path
> > will be correctly configured and properly probe all drivers.
>
> The problem is that bus drivers register themselves in constructors and
> these construtors are not run with as-needed.
Are the constructors run on dlopen of the bus driver?
next prev parent reply other threads:[~2019-07-22 17:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-15 23:41 [dpdk-stable] " Stephen Hemminger
2019-07-16 0:16 ` Stephen Hemminger
2019-07-16 0:19 ` Stephen Hemminger
2019-07-16 8:46 ` [dpdk-stable] [dpdk-dev] " Bruce Richardson
2019-07-16 14:46 ` Stephen Hemminger
2019-07-19 18:11 ` Stephen Hemminger
2019-07-19 20:39 ` Stephen Hemminger
2019-07-19 20:55 ` Stephen Hemminger
2019-07-22 7:38 ` Thomas Monjalon
2019-07-22 9:06 ` Bruce Richardson
2019-07-22 16:43 ` Stephen Hemminger
2019-07-22 17:04 ` Thomas Monjalon [this message]
2019-07-22 17:13 ` Stephen Hemminger
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