Re: PR/53998 CVS commit: src/sys/kern

[BERTRAND Joël <joel.bertrand%systella.fr@localhost>]

Christos Zoulas a écrit :
> The following reply was made to PR kern/53998; it has been noted by GNATS.
> 
> From: christos%zoulas.com@localhost (Christos Zoulas)
> To: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost, 
> 	gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
> 	joel.bertrand%systella.fr@localhost
> Cc: 
> Subject: Re: PR/53998 CVS commit: src/sys/kern
> Date: Mon, 25 Feb 2019 09:22:40 -0500
> 
>  On Feb 25,  2:05pm, joel.bertrand%systella.fr@localhost (=?UTF-8?Q?BERTRAND_Jo=c3=abl?=) wrote:
>  -- Subject: Re: PR/53998 CVS commit: src/sys/kern
>  
>  |  	Christos,
>  |  
>  |  	I have applied bith patch (you will find in attachment patch against -8).
>  |  
>  |  	This patch partially fixes this PR as my test program can create more
>  |  threads before first sem_init() failure. But I think there is another
>  |  race condition somewhere in semaphore subsystem.
>  |  
>  |  	After sem_init() failure, there is no specific message in dmesg or logfile.
>  |  
>  |  	I don't understand why atomic_dec_uint(&nsems_total) or
>  |  atomic_inc_uint(&nsems_total) are not protected by a lock.
>  
>  Yes, the whole thing is racy... But atomics don't need to be protected
>  by locks... How does it fail now ENFILE?

LAST ERROR: Unknown error: 4294967295 (-1)

Same errno.