Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1274292

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

Show all headers | View raw

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.

Phil Sutter (4):
  rhashtable-test: add cond_resched() to thread test
  rhashtable-test: retry insert operations
  rhashtable-test: calculate max_entries value by default
  rhashtable-test: allow to retry even if -ENOMEM was returned

 lib/test_rhashtable.c | 76 +++++++++++++++++++++++++++++++++------------------
 1 file changed, 50 insertions(+), 26 deletions(-)

-- 
2.1.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 0/4] improve fault-tolerance of rhashtable runtime-test Phil Sutter <phil@nwl.cc> - 2015-11-20 18:20 +0100
  [PATCH v2 1/4] rhashtable-test: add cond_resched() to thread test Phil Sutter <phil@nwl.cc> - 2015-11-20 18:20 +0100
  Re: [PATCH v2 0/4] improve fault-tolerance of rhashtable  runtime-test David Miller <davem@davemloft.net> - 2015-11-23 18:40 +0100
  Re: [PATCH v2 0/4] improve fault-tolerance of rhashtable runtime-test Herbert Xu <herbert@gondor.apana.org.au> - 2015-11-30 10:40 +0100
    Re: [PATCH v2 0/4] improve fault-tolerance of rhashtable runtime-test Phil Sutter <phil@nwl.cc> - 2015-11-30 11:20 +0100
      Re: [PATCH v2 0/4] improve fault-tolerance of rhashtable runtime-test Herbert Xu <herbert@gondor.apana.org.au> - 2015-11-30 11:20 +0100

csiph-web