Child crashes when the backend is down

Poul-Henning Kamp phk at
Wed May 2 10:46:14 CEST 2007

In message <ujr1whzvco5.fsf at>, Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= writes:
>"Poul-Henning Kamp" <phk at> writes:
>> o->busy is protected by the objhead mutex because otherwise we would have
>> to grab all the objects mutexes in the hash lookup.
>> The busy flag is very seldomly manipulated, and this is much more efficie=
>Fine, but what is the locking protocol when o has no objhead?

Obviously nobody else will ever check the busy flag in that case,
so the locking isn't necessary.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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