Re: [PATCH] build: use gnulib fdatasync

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On 10/25/2011 04:50 PM, Daniel P. Berrange wrote:
> On Tue, Oct 25, 2011 at 09:32:13AM -0600, Eric Blake wrote:
>> [adding bug-gnulib]
>>
>> On 10/25/2011 03:44 AM, Jiri Denemark wrote:
>>> On Mon, Oct 24, 2011 at 16:44:49 -0600, Eric Blake wrote:
>>>> Commit 1726a73 hacked around MacOS' lack of fdatasync, since
>>>> gnulib did not have it at the time.  But now that we use newer
>>>> gnulib, we can avoid the hack.
>>>>
>>>> * bootstrap.conf (gnulib_modules): Add fdatasync.
>>>> * configure.ac (AC_CHECK_FUNCS_ONCE): Drop our own check.
>>>> ---
>>>>  bootstrap.conf |    1 +
>>>>  configure.ac   |    5 +----
>>>>  2 files changed, 2 insertions(+), 4 deletions(-)
>>>
>>> ACK
>>>
>>> BTW, are there any plans on enhancing gnulib fsync module to provide a
>>> replacement for certain versions of OS X? Although they provide fsync, it
>>> doesn't really sync anything and one needs to do some ioctl hackery to really
>>> achieve what fsync should do.
>>
>> Any quick pointers to example code using that ioctl?  Then again,
>> I'll probably find them with a quick google search myself.
> 
> I learnt about the problem from
> 
> http://www.flamingspork.com/talks/2007/06/eat_my_data.odp
> 
> pages 100-119 are the "fun" part of the story

I think the mysql guys got a bit confused.
Here's an apple engineer (Dominic Giampaolo) clarifying things
http://lists.mindrot.org/pipermail/portawiki-discuss/2005-November/000002.html

cheers,
Pádraig.

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