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Message-Id: <1474545269-8694-1-git-send-email-wagi@monom.org>
Date: Thu, 22 Sep 2016 13:54:27 +0200
From: Daniel Wagner <wagi@...om.org>
To: linux-nfs@...r.kernel.org
Cc: Anna Schumaker <anna.schumaker@...app.com>,
Trond Myklebust <trond.myklebust@...marydata.com>,
linux-kernel@...r.kernel.org,
Daniel Wagner <daniel.wagner@...-carit.de>
Subject: [PATCH 0/2] NFS: Use complete() instead complete_all()
From: Daniel Wagner <daniel.wagner@...-carit.de>
Hi,
Using complete_all() is not wrong per se but it suggest that there
might be more than one waiter. For -rt I am reviewing all
complete_all() users and would like to leave only the real ones in the
tree. The main problem for -rt about complete_all() is that it can be
uses inside IRQ context and that can lead to unbounded amount work
inside the interrupt handler. That is a no no for -rt.
Besides trying to analys all the code paths to the wait_for_completion()
call and convince myself that there is only one waiter, I also run
a few tests:
- some fio benchmarks
- pynfs
-cthon04
Non of them exposed any blocking threads etc. pynfs did showed some
failures but I am guessing that is just missing implementation:
pynfs/nfs4.1/testserver.py random:/home/nfs-test --force -v all
EID50 st_exchange_id.testSSV : FAILURE
NFS4Error: OP_EXCHANGE_ID should return NFS4_OK,
instead got NFS4ERR_ENCR_ALG_UNSUPP
LKPP1a st_lookupp.testLink : RUNNING
LKPP1a st_lookupp.testLink : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_SYMLINK, instead got NFS4ERR_NOENT
LKPP1b st_lookupp.testBlock : RUNNING
LKPP1b st_lookupp.testBlock : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1c st_lookupp.testChar : RUNNING
LKPP1c st_lookupp.testChar : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1d st_lookupp.testLookupp : RUNNING
LKPP1d st_lookupp.testLookupp : PASS
LKPP1f st_lookupp.testFifo : RUNNING
LKPP1f st_lookupp.testFifo : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1r st_lookupp.testFile : RUNNING
LKPP1r st_lookupp.testFile : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1s st_lookupp.testSock : RUNNING
LKPP1s st_lookupp.testSock : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
PUTFH1a st_putfh.testLink : RUNNING
PUTFH1a st_putfh.testLink : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1b st_putfh.testBlock : RUNNING
PUTFH1b st_putfh.testBlock : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1c st_putfh.testChar : RUNNING
PUTFH1c st_putfh.testChar : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1d st_putfh.testDir : RUNNING
PUTFH1d st_putfh.testDir : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1f st_putfh.testFifo : RUNNING
PUTFH1f st_putfh.testFifo : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1r st_putfh.testFile : RUNNING
PUTFH1r st_putfh.testFile : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1s st_putfh.testSocket : RUNNING
PUTFH1s st_putfh.testSocket : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM1b st_rename.testValidBlock : RUNNING
RNM1b st_rename.testValidBlock : FAILURE
OP_CREATE should return NFS4_OK, instead got
NFS4ERR_PERM
RNM1c st_rename.testValidChar : RUNNING
RNM1c st_rename.testValidChar : FAILURE
OP_CREATE should return NFS4_OK, instead got
NFS4ERR_PERM
RNM2a st_rename.testSfhLink : RUNNING
RNM2a st_rename.testSfhLink : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2b st_rename.testSfhBlock : RUNNING
RNM2b st_rename.testSfhBlock : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2c st_rename.testSfhChar : RUNNING
RNM2c st_rename.testSfhChar : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2f st_rename.testSfhFifo : RUNNING
RNM2f st_rename.testSfhFifo : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2r st_rename.testSfhFile : RUNNING
RNM2r st_rename.testSfhFile : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2s st_rename.testSfhSocket : RUNNING
RNM2s st_rename.testSfhSocket : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3a st_rename.testCfhLink : RUNNING
RNM3a st_rename.testCfhLink : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3b st_rename.testCfhBlock : RUNNING
RNM3b st_rename.testCfhBlock : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3c st_rename.testCfhChar : RUNNING
RNM3c st_rename.testCfhChar : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3f st_rename.testCfhFifo : RUNNING
RNM3f st_rename.testCfhFifo : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3r st_rename.testCfhFile : RUNNING
RNM3r st_rename.testCfhFile : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3s st_rename.testCfhSocket : RUNNING
RNM3s st_rename.testCfhSocket : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
EID50 st_exchange_id.testSSV : FAILURE
NFS4Error: OP_EXCHANGE_ID should return NFS4_OK,
instead got NFS4ERR_ENCR_ALG_UNSUPP
LKPP1a st_lookupp.testLink : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_SYMLINK, instead got NFS4ERR_NOENT
LKPP1b st_lookupp.testBlock : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1c st_lookupp.testChar : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1f st_lookupp.testFifo : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1r st_lookupp.testFile : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
LKPP1s st_lookupp.testSock : FAILURE
LOOKUPP with non-dir <cfh> should return
NFS4ERR_NOTDIR, instead got NFS4ERR_NOENT
PUTFH1a st_putfh.testLink : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1b st_putfh.testBlock : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1c st_putfh.testChar : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1d st_putfh.testDir : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1f st_putfh.testFifo : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1r st_putfh.testFile : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
PUTFH1s st_putfh.testSocket : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM1b st_rename.testValidBlock : FAILURE
OP_CREATE should return NFS4_OK, instead got
NFS4ERR_PERM
RNM1c st_rename.testValidChar : FAILURE
OP_CREATE should return NFS4_OK, instead got
NFS4ERR_PERM
RNM2a st_rename.testSfhLink : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2b st_rename.testSfhBlock : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2c st_rename.testSfhChar : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2f st_rename.testSfhFifo : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2r st_rename.testSfhFile : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM2s st_rename.testSfhSocket : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3a st_rename.testCfhLink : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3b st_rename.testCfhBlock : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3c st_rename.testCfhChar : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3f st_rename.testCfhFifo : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3r st_rename.testCfhFile : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
RNM3s st_rename.testCfhSocket : FAILURE
OP_LOOKUP should return NFS4_OK, instead got
NFS4ERR_NOENT
VF1r st_verify.testMandFile : FAILURE
cheers,
daniel
Daniel Wagner (2):
NFS: direct: use complete() instead of complete_all()
NFS: cache_lib: use complete() instead of complete_all()
fs/nfs/cache_lib.c | 2 +-
fs/nfs/direct.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--
2.7.4
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