[APPCDS] JDK-8236847: JDK built on machine with 4K pages refused to start on machine with 64k pages

[David Holmes]

On 9/01/2020 6:29 pm, Dmitry Samersoff wrote:
> Hello Ioi,
> 
> *Story*
> 
> If you build JDK-14 with the changes for
> 
>    JDK-8231610 Relocate the CDS archive if it cannot be mapped
>    to the requested address
> 
> on a machine with 4k pages (typical Jenkins machine) then move the
> bundle to a huge server with 64k pages, it refuses to start with
> 
> [0.015s][error][cds] Unable to map CDS archive --
> os::vm_allocation_granularity() expected: 4096 actual: 65536
> 
> *Question*
> 
> I'm not sure if just removing an assert is the correct fix. What would
> you recommend?

I thought that failing to map the archive was a non-fatal error that 
just results in falling back to not using CDS. Even in a debug build 
this should not be an assertion unless perhaps the user has explicitly 
requested CDS to be enabled.

> Also @build-dev - is it possible to add configure option to disable
> AppCDS archive generation?

Already there I think: --disable-cds-archive

Cheers,
David
-----


> 
> -Dmitry\S
> 
> 
>