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    SubjectRe: [dm-devel] [PATCH v5] fault-injection: introduce kvmalloc fallback options
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    On Thu, 2018-04-26 at 10:28 -0400, Mikulas Patocka wrote:
    >
    > On Thu, 26 Apr 2018, Michal Hocko wrote:
    >
    > > On Wed 25-04-18 18:42:57, Mikulas Patocka wrote:
    > > > 
    > > > 
    > > > On Wed, 25 Apr 2018, James Bottomley wrote:
    > > [...]
    > > > > Kconfig proliferation, conversely, is a bit of a nightmare from
    > both
    > > > > the user and the tester's point of view, so we're trying to
    > avoid it
    > > > > unless absolutely necessary.
    > > > > 
    > > > > James
    > > > 
    > > > I already offered that we don't need to introduce a new kernel
    > option and 
    > > > we can bind this feature to any other kernel option, that is
    > enabled in 
    > > > the debug kernel, for example CONFIG_DEBUG_SG. Michal said no and
    > he said 
    > > > that he wants a new kernel option instead.
    > > 
    > > Just for the record. I didn't say I _want_ a config option. Do not
    > > misinterpret my words. I've said that a config option would be
    > > acceptable if there is no way to deliver the functionality via
    > kernel
    > > package automatically. You haven't provided any argument that would
    > > explain why the kernel package cannot add a boot option. Maybe
    > there are
    > > some but I do not see them right now.
    >
    > AFAIK Grub doesn't load per-kernel options from a per-kernel file.
    > Even if we hacked grub scripts to add this option, other
    > distributions won't.

    Perhaps find out beforehand instead of insisting on an approach without
    knowing. On openSUSE the grub config is built from the files in
    /etc/grub.d/ so any package can add a kernel option (and various
    conditions around activating it) simply by adding a new file. The
    config files are quite sophisticated, so you can add what looks to be a
    new kernel, but is really an existing kernel with different options
    this way.

    James

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