On 2014-04-03 16:42, Bruce Cran wrote:
On 4/1/2014 9:11 PM, Bruce Cran wrote:
On 3/12/2014 10:33 AM, Jens Axboe wrote:
On 03/12/2014 09:41 AM, Sébastien Bouchex Bellomié wrote:
fio: pid=5144, err=5/file:backend.c:768, func=full resid,
error=Input/output error
random_read: (groupid=0, jobs=1): err= 5 (file:backend.c:768,
func=full resid, error=Input/output error): pid=5144: Wed Mar 12
16:36:45 2014
Bruce, do you know why that is?
It appears to be because after seeking, there's 92 bytes before a
space in the file (i.e. it's a sparse file), and instead of filling
the buffer with 0's read() is for some reason returning 0.
I was wrong. The problem has something to do with fil_io_buffer - and
in particular __fill_random_buf. The io error disappears if I change the
line:
*ptr = seed;
to
*ptr = 1;
Also, fio-2.0.15 works, while fio-2.1 doesn't.
That makes very little sense... How could the contents of the buffer
change the behavior?
Could you run a git bisect? Should be quick'n easy, if it's nicely
reproducible.
--
Jens Axboe
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