Problem with inn_lock_range

Kiernan, Alex alexk at demon.net
Thu Dec 19 04:05:00 UTC 2002


> I've been staring at the buffindexed problems and, at least 
> on Solaris, I
> think I know why its broken - inn_lock_range doesn't work for 
> files which
> are mmaped. Basically all the fcntl(F_SETLKW) return EAGAIN, because:
> 
> "    The fcntl() function will fail if:
> 
>      EAGAIN
> ...
>            or the cmd argument
>            is F_SETLK, F_SETLK64, F_SETLKW, or F_SETLKW64, manda-
>            tory file/record locking  is  set,  and  the  file  is

Of course I missed the mandatory in there :(

> this is also true for tradindexed BTW on the group.index file 
> (at least the
> old implementation - not running the new one yet) - I'd seen 
> the streams of
> EAGAINs when trussing, just never looked hard enough.
> 

But I really do have streams of EAGAINs on a production box :(

-- 
Alex Kiernan, Principal Engineer, Development, THUS plc


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