8241354: ZGC: fatal error: Failed to get NUMA id due to get_mempolicy operation not permitted(Internet mail)

[jiefu(傅杰)]

Hi Erik,

Thanks for your review and valuable comments.

Updated: http://cr.openjdk.java.net/~jiefu/8241354/webrev.01/

Please review it.

Thanks a lot.
Best regards,
Jie

On 2020/3/22, 4:26 PM, "Erik Österlund" <erik.osterlund at oracle.com> wrote:

    Hi Jie,
    
    It seems to me that if the environment doesn’t supply the required NUMA APIs, then we really should disable UseNUMA instead. I propose we check the availability of the syscall during initialization instead, and switch off all NUMA functionality when appropriate. And we should only print a warning if the user explicitly supplied UseNUMA on the command line.
    
    Thanks,
    /Erik
    
    > On 20 Mar 2020, at 13:15, jiefu(傅杰) <jiefu at tencent.com> wrote:
    > 
    > Hi all,
    > 
    > JBS:    https://bugs.openjdk.java.net/browse/JDK-8241354
    > Webrev: http://cr.openjdk.java.net/~jiefu/8241354/webrev.00/
    > 
    > A VM fatal error may be observed if ZGC is used.
    > 
    > The background is that some of our products will run in the docker.
    > For some safety reason, SYS_get_mempolicy is not allowed in the docker.
    > 
    > It might be not a good practice to generate a fatal error when get_mempolicy fails.
    > What do you think?
    > 
    > Thanks a lot.
    > Best regards,
    > Jie