Date: Fri, 6 Dec 2002 04:34:41 -0800 From: David Schultz <dschultz@uclink.Berkeley.EDU> To: Varshavchick Alexander <alex@metrocom.ru> Cc: Terry Lambert <tlambert2@mindspring.com>, freebsd-questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: maxusers and random system freezes Message-ID: <20021206123440.GA16544@HAL9000.homeunix.com> In-Reply-To: <Pine.GSO.4.33.0212061431040.15512-100000@apache.metrocom.ru> References: <20021206112942.GA16222@HAL9000.homeunix.com> <Pine.GSO.4.33.0212061431040.15512-100000@apache.metrocom.ru>
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Thus spake Varshavchick Alexander <alex@metrocom.ru>: > Well, now I made KVA space 2G, we'll see later on if it helps to get rid > of the sudden system halts, but for some reason a side-effect has > appeared: pthread_create function returns EAGAIN error now, so I had to > recompile the software using it with linux threads to make it working. > With the old kernel these pieces worked without problems. Can it be that > somehow the enlarged KVA space messed up with the threads mechanism? I'm not a pthreads expert, but my best guess is that your program tried to create a thread with a stack address that was too high. Remember that with a 2 GB KVA, user processes have only 2 GB to play with instead of 3 GB, so attempting to mmap() a stack above about 2 GB would cause pthread_create() to return EAGAIN. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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