[jira] [Work logged] (TS-4957) Make the use of madvise() with MADV_DONTDUMP configurable

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-4957?focusedWorklogId=30873&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-30873 ]

ASF GitHub Bot logged work on TS-4957:
--------------------------------------

                Author: ASF GitHub Bot
            Created on: 19/Oct/16 13:13
            Start Date: 19/Oct/16 13:13
    Worklog Time Spent: 10m 
      Work Description: Github user jrushford commented on the issue:

    https://github.com/apache/trafficserver/pull/1097
  
    Thanks @jpeach.  FWIW, this patch is originally from TS-3417 and @PSUdaemon and I dug it up after we discovered we had a problem with madvise() and to fix, required deploying a new rpm to 1300+ proxies.  I'm okay with the name change and will make it if @zwoop and @PSUdaemon agree.


Issue Time Tracking
-------------------

            Worklog Id:     (was: 30873)
            Time Spent: 10m
    Remaining Estimate: 0h

> Make the use of madvise() with MADV_DONTDUMP configurable
> ---------------------------------------------------------
>
>                 Key: TS-4957
>                 URL: https://issues.apache.org/jira/browse/TS-4957
>             Project: Traffic Server
>          Issue Type: Improvement
>          Components: Core
>            Reporter: John Rushford
>            Assignee: John Rushford
>             Fix For: sometime
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> We have run into problems with ATS 5.3.x when using madvise() with the MADV_DONTDUMP option to exclude IO buffers from core files.  Under load, we have seen high cpu loads and very slow time to serve times when allocating IO buffers and marking them with this flag.  We have had to disable calls to madvise() in ats_madvise(), rebuild and redeploy to fix this problem.  We'd like to make the use of madvise() with the MADV_DONTDUMP option configurable.  The PR associated with this ticket uses a patch from TS-3417 that implements making MADV_DONTDUMP configurable.



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