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Message-ID: <968cfa1e-3cdf-0c4d-bdf9-f66298fa8616@gmail.com>
Date: Thu, 4 Jun 2020 23:01:24 +0200
From: Mikhail Morfikov <mmorfikov@...il.com>
To: lkrg-users@...ts.openwall.com
Subject: Re: Support for 5.7 linux kernel?
On 04/06/2020 21:44, Solar Designer wrote:
> On Thu, Jun 04, 2020 at 02:09:27PM +0200, Mikhail Morfikov wrote:
>> On 04/06/2020 12:37, Solar Designer wrote:
>>> Maybe we need to support LKRG build without CONFIG_MODULE_UNLOAD, by
>>> conditionally excluding the corresponding functionality from LKRG as
>>> well. Adam, what do you think?
>>
>> What functionality would be affected if CONFIG_MODULE_UNLOAD was set to off?
>
> I guess module unloading would be unsupported, including of LKRG.
>
> config MODULE_UNLOAD
> bool "Module unloading"
> help
> Without this option you will not be able to unload any
> modules (note that some modules may not be unloadable
> anyway), which makes your kernel smaller, faster
> and simpler. If unsure, say Y.
>
> It's weird to have the entire kernel configured with module support
> enabled yet module unloading disabled, though - except maybe for some
> embedded applications.
>
> Alexander
>
Actually, according to the kernel config info, it's pretty reasonable, since it
"makes your kernel ... faster and simpler". I build my kernels without the
option to unload modules because I compile every needed module into the kernel
itself, and I don't really think of unloading them later. :) I would even set
CONFIG_MODULES to off, but many apps rely on some files, which that option
provides, and the apps don't work well without them. So I only uncheck
MODULE_UNLOAD. Now I have only one module -- lkrg, so the module loading feature
is must-have, but still I don't really see any reason why it chould be unloaded.
The configuration of the module doesn't really change much from one boot to the
other. So if only the module unloading feature would be unsupported, I think no
harm is dome, and this could be optional in order to support the
faster/simpler kernels. :)
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