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https://issues.apache.org/jira/browse/CASSANDRA-19196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17795906#comment-17795906
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Tibor Repasi commented on CASSANDRA-19196:
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{quote}The bug report is perfectly clear to me - 6.1.64 and 6.1.65 kernels have
a bug{quote}
Note that those are vanilla kernel versions. Many Linux distributions patch
their kernels and (back-)port patches across everything. Thus, matching the
version doesn't necessarily mean that the kernel is buggy.
Analog to that, there is a startup-warning if swap is enabled, even if
vm.swappines is turned down. The argument, however, that this could lead to
data corruption weights higher.
In my opinion, as a Cassandra operator, this constellation is easy to oversee
and threatens operations with data loss - possibly all over a cluster, making
this a business risk. Thus, a startup-stopper which can be cleared with a
property seems fine to me.
> Don't allow to enable direct i/o with broken kernels
> ----------------------------------------------------
>
> Key: CASSANDRA-19196
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19196
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Local Write-Read Paths
> Reporter: Jacek Lewandowski
> Assignee: Jacek Lewandowski
> Priority: Normal
> Fix For: 5.0-rc, 5.1
>
>
> https://lwn.net/Articles/954285/, found by [~rustyrazorblade]
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