Re: [RFC Patch 1/2] kexec: show memory info in /proc/iomem

[Amerigo Wang]

Eric W. Biederman wrote:
> Amerigo Wang <amwang@xxxxxxxxxx> writes:
>
>   
> > > Nacked-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
> > >
> > > We can inspect the image we are going to load to get this information.
> > > In fact /sbin/kexec already inspects the image we are going to load
> > > to get this information.  Putting this in the kernel adds kernel
> > > complexity for no gain.
> > >   
> > >       
> > /sbin/kexec is supported to know this, of course. But this is not for
> > /sbin/kexec, this is for user (or other programs) to observe the memory
> > information, so that he can know the memory he reserved is too much or not.
> >     
>
>   
> > Without this, it is a little hard to use patch 2/2.
> >     
>
> So add on option to /sbin/kexec.
>   

This can be another choice.
> Furthermore none of this does a good job of predicting how much
> memory /sbin/fsck will require to check the filesystem before we
> write a crash dump.
>   

No one actually knows this without testing... But if 128M on x86 is 
still not enough, that is probably a bug of fsck, not our fault.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/