Re: [PATCH v2 0/4] improve fault-tolerance of rhashtable runtime-test

David Miller
2015-11-23T17:38:24Z

From: Phil Sutter <phil@nwl.cc>
Date: Fri, 20 Nov 2015 18:17:16 +0100

> The following series aims to improve lib/test_rhashtable in different
> situations:
>
> Patch 1 allows the kernel to reschedule so the test does not block too
> long on slow systems.
> Patch 2 fixes behaviour under pressure, retrying inserts in non-permanent
> error case (-EBUSY).
> Patch 3 auto-adjusts the upper table size limit according to the number
> of threads (in concurrency test). In fact, the current default is
> already too small.
> Patch 4 makes it possible to retry inserts even in supposedly permanent
> error case (-ENOMEM) to expose rhashtable's remaining problem of
> -ENOMEM being not as permanent as it is expected to be.
>
> Changes since v1:
> - Introduce insert_retry() which is then used in single-threaded test as
> well.
> - Do not retry inserts by default if -ENOMEM was returned.
> - Rename the retry counter to be a bit more verbose about what it
> contains.
> - Add patch 4 as a debugging aid.

Series applied, thanks Phil.