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Re: kern/39420: stopped processes can hold locks
The following reply was made to PR kern/39420; it has been noted by GNATS.
From: yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%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.
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