Thank you so much for detailed advise!! Best regards,
2022년 10월 20일 (목) 오전 2:03, Bjørn Mork <bj...@mork.no>님이 작성: > Do Hak Yong <crazyra...@gmail.com> writes: > > > Hello kernel experts, > > > > I have a few questions about the priority of kernel drivers and third > party > > drivers. > > > > If I install a third party vendor driver, which has the same module name > as > > kernel provides, for example, Qlogic driver has the same module name as > > third party driver(qla2xxx). > > > > The questions are: > > > > Q1. Which driver has higher priority and which driver will be used? will > > there any be problems? > > See depmod.d(5). > > Unless overridden by config, modules in /lib/modules/$(uname -r)/updates > have priority over other modules. This can be used to replace kernel > modules with a third party driver. > > The third party driver could also use a startup script to forcibly > replace already loaded modules. > > > Q2. How to control which driver the os will use? > > If the file names are identical, then use the "updates" directory or > configure another location to have priority over the kernel modules. > > If the file names are different, then you can blacklist the kernel > module to make sure the third party module is the only one available for > auto-loading. See modprobe.d(5) > > > Q3. What if the updated kernel installed and provied higher driver > version > > than third party? Which one will be used then? > > The default is to consider only the modules in /lib/modules/$(uname -r) > > Any third party module must be updated along with the kerne. Or copied > into the new location if binary compatible. But that's not likely in > general. > > > I think third party drivers have more precedence that kernel drivers > refer > > to below Red Hat KB, but I'm not sure which one will be used when the > > kernel has updated. > > > > https://access.redhat.com/solutions/176213 > > Redhat uses a more complex depmod configuration than default. You > should probably ask them about their setup. Or just look at the config > in /etc/depmod.d/*.conf > > > Bjørn >
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