SEEK_HOLE and SEEK_DATA does not work on zfs (with test case)

Attila Nagy bra at fsn.hu
Wed Apr 4 08:50:11 UTC 2012


On 04/04/12 10:38, Andriy Gapon wrote:
> on 04/04/2012 10:52 Attila Nagy said the following:
>> Hi,
>>
>> I've started to experiment with SEEK_HOLE and SEEK_DATA in python on a recent
>> FreeBSD 9-STABLE/amd64 box and it quickly became evident that the program that
>> works on Solaris doesn't work on FreeBSD.
>> Python itself couldn't cause this, because it correctly issues the lseek, but
>> taking the C test program from here:
>> https://lkml.org/lkml/2011/4/22/79
>> gives the same result (failure).
> Please see this PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/164445
> If you can't figure out a patch from its contents, then I'll try to provide it
> some time later today.
>
I will try it, but the e-mail above the patch is somewhat scary...


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