Date: Thu, 10 Jul 1997 12:28:57 +0200 From: Poul-Henning Kamp <phk@dk.tfs.com> To: dg@root.com Cc: Poul-Henning Kamp <phk@dk.tfs.com>, freebsd-bugs@freebsd.org Subject: Re: kern/4070: cannot access over 64MB memory Message-ID: <10300.868530537@critter.dk.tfs.com> In-Reply-To: Your message of "Thu, 10 Jul 1997 02:45:21 PDT." <199707100945.CAA28234@implode.root.com>
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In message <199707100945.CAA28234@implode.root.com>, David Greenman writes:
> Nonetheless, the problem is that he's hitting the process ulimit. As you
>know, the failure mode for running out of memory (RAM + swap) is quite
>different than the error indicated in this problem report. Perhaps the problem
>is caused by VM fragmentation? Or a bug in malloc?
It seems to me that phkmalloc does the logical (and correct!) thing:
schizo phk> limits
Resource limits (current):
cputime infinity secs
filesize infinity kb
datasize-cur 65536 kb
stacksize-cur 8192 kb
coredumpsize infinity kb
memoryuse-cur 29460 kb
memorylocked-cur 9821 kb
maxprocesses 1620
openfiles 3240
schizo phk> cat a.c
main()
{
malloc(64*1024*1024);
}
schizo phk> cc a.c
schizo phk> ktrace ./a.out
schizo phk> kdump | tail -5
6761 a.out CALL break(0x4000)
6761 a.out RET break 0
6761 a.out CALL break(0x4004000)
6761 a.out RET break -1 errno 12 Cannot allocate memory
6761 a.out CALL exit(0)
schizo phk> limit datasize unlimited
schizo phk> limits
Resource limits (current):
cputime infinity secs
filesize infinity kb
datasize 131072 kb
stacksize-cur 8192 kb
coredumpsize infinity kb
memoryuse-cur 29460 kb
memorylocked-cur 9821 kb
maxprocesses 1620
openfiles 3240
schizo phk> ktrace ./a.out
schizo phk> kdump | tail -5
6767 a.out CALL mmap(0,0x12000,0x3,0x1002,0xffffffff,0,0,0)
6767 a.out RET mmap 134836224/0x8097000
6767 a.out CALL munmap(0x801c000,0x1000)
6767 a.out RET munmap 0
6767 a.out CALL exit(0x4000)
schizo phk> kdump | grep sbrk
schizo phk> kdump | grep break
6767 a.out CALL break(0x4000)
6767 a.out RET break 0
6767 a.out CALL break(0x4004000)
6767 a.out RET break 0
--
Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team.
http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox.
whois: [PHK] | phk@tfs.com TRW Financial Systems, Inc.
Power and ignorance is a disgusting cocktail.
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