Linux Server - kernel: mtrr: type mismatch

Posted on 2007-10-03
Last Modified: 2013-12-16
My Linux server has rebooted and hung on me today.

I've been reviewing the log tosee if there's anything that indicates what the cause may have been, and there's not a lot to go on. However, I have some of the following entries in my log and as I am no Linux expert I don't know exactly what they are telling me, or if I should be concerned about them.

Oct  3 23:29:18 <server_name> kernel: mtrr: type mismatch for fc000000,800000 old: uncachable new: write-combining

Is this indicative of a problem or is this just a normal entry to be expected in the log ?


Question by:ccfcfc
    LVL 14

    Accepted Solution

    I think that is normal on systems that support mtrr (memory type range registers), it is switching from uncachable to write-combining to speed things up.
    LVL 14

    Expert Comment

    I wouldn't think you should see that very often though - how often does it show up?

    Author Comment

    It's only there during boot. How about the following ?

    Oct  3 18:00:02 <server_name> kernel: audit(1191398402.843:109): avc:  denied  { read write } for  pid=1939 comm="syslogd" name="messages_fifo" dev=dm-0 ino=1163297 scontext=user_u:system_r:syslogd_t tcontext=root:object_r:var_spool_t tclass=fifo_file

    Oct  3 18:00:02 <server_name> kernel: audit(1191398402.843:110): avc:  denied  { ioctl } for  pid=1939 comm="syslogd" name="messages_fifo" dev=dm-0 ino=1163297 scontext=user_u:system_r:syslogd_t tcontext=root:object_r:var_spool_t tclass=fifo_file

    Featured Post

    Do You Know the 4 Main Threat Actor Types?

    Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

    Join & Write a Comment

    How many times have you wanted to quickly do the same thing to a list but found yourself typing it again and again? I first figured out a small time saver with the up arrow to recall the last command but that can only get you so far if you have a bi…
    It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
    Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
    Connecting to an Amazon Linux EC2 Instance from Windows Using PuTTY.

    746 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    16 Experts available now in Live!

    Get 1:1 Help Now