Re: kern/39420: stopped processes can hold locks

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

The following reply was made to PR kern/39420; it has been noted by GNATS.

From: yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, 
netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/39420: stopped processes can hold locks
Date: Thu,  2 Oct 2008 08:12:35 +0900 (JST)

 > >Number:         39420
 > >Category:       kern
 > >Synopsis:       stopped processes can hold locks
 
 are you using interruptible nfs mount?
 in that case, nfs uses PCATCH/cv_wait_sig for I/O and can be
 suspended by user.
 ups@ suggested introducing something like PCATCH|PNOSUSPEND while ago.
 i think that an alternative is not suspending LWPs in the middle of
 sleepq_block.  ie. suspend LWPs only on user-kernel boundaries.
 
 YAMAMOTO Takashi