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From: Jens Axboe <axboe@kernel.dk>
To: kusumi.tomohiro@gmail.com
Cc: fio@vger.kernel.org, Tomohiro Kusumi <tkusumi@tuxera.com>
Subject: Re: [PATCH 3/8] Add assert(0) to DDIR_DATASYNC sync path if fdatasync(2) is unsupported
Date: Sat, 8 Apr 2017 11:02:54 -0600	[thread overview]
Message-ID: <20170408170252.GA13541@kernel.dk> (raw)
In-Reply-To: <20170404202218.52260-3-tkusumi@tuxera.com>

On Tue, Apr 04 2017, kusumi.tomohiro@gmail.com wrote:
> From: Tomohiro Kusumi <tkusumi@tuxera.com>
> 
> If ddir is DDIR_DATASYNC, it means fio supports fdatasync(2), or it
> at least compiled on ./configure. If a platform without fdatasync(2)
> happens to take DDIR_DATASYNC path in do_io_u_sync(), it's simply wrong
> (because ddir should never be DDIR_DATASYNC due to td->o.fdatasync_blocks == 0)
> thus should be aborted rather than continue with EINVAL.
> 
> This commit also leaves the existing code from #else path to avoid
> compilers complain for uninitialized ret variable.

EINVAL should cause termination, I don't think there's any reason to use
assert here. In general, if we can handle even cases that we think
should not occur, then we should do so instead of dumping core.

-- 
Jens Axboe



  reply	other threads:[~2017-04-08 17:02 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-04 20:22 [PATCH 1/8] Don't silently terminate td when no I/O performed due to error kusumi.tomohiro
2017-04-04 20:22 ` [PATCH 2/8] dump_td_info() doesn't really need to be a function kusumi.tomohiro
2017-04-04 20:22 ` [PATCH 3/8] Add assert(0) to DDIR_DATASYNC sync path if fdatasync(2) is unsupported kusumi.tomohiro
2017-04-08 17:02   ` Jens Axboe [this message]
2017-04-04 20:22 ` [PATCH 4/8] Make lib/prio_tree.c a stand-alone library kusumi.tomohiro
2017-04-04 20:22 ` [PATCH 5/8] Make lib/memalign.c " kusumi.tomohiro
2017-04-04 20:22 ` [PATCH 6/8] Make lib/num2str.c a stand-alone library by adding lib/num2str.h kusumi.tomohiro
2017-04-04 20:22 ` [PATCH 7/8] Fix num2str() output when maxlen <= strlen(tmp) kusumi.tomohiro
2017-04-04 20:22 ` [PATCH 8/8] Fix num2str() output when modulo != -1U kusumi.tomohiro
2017-04-04 20:46   ` Elliott, Robert (Persistent Memory)
2017-04-08 17:05 ` [PATCH 1/8] Don't silently terminate td when no I/O performed due to error Jens Axboe

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