Comment 2 for bug 1709889
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| bugproxy (bugproxy) wrote Comment bridged from LTC Bugzilla | #2 |
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0e1f616
(Get the code!)
------- Comment From <email address hidden> 2017-08-11 07:44 EDT-------
Testing shows that this commit appears to fix the problem. After 20 hours, no evidence of stalled I/Os.
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This fixes a problem introduced by having two modes of operation for cfq that each uses a different timebase, and not having separate scheduling delay (time limit before forcing I/O submit) settings. What appears to be the default mode, "iops", ended up using a delay that allowed I/Os to be postponed for up to 200000000 jiffies (which is hundreds of hours).