Re: patch-int-2.4.0.2 and SMP

[Andrew McDonald <andrew@mcdonald.org.uk>]

On Sun, Jan 14, 2001 at 03:11:31PM +0000, Andrew McDonald wrote:
> There appears to be a problem with compiling the crypto patch for an
> SMP system. modprobe'ing a cipher module reliably locks up the system
> (no oops). The sequence of commands:
> # modprobe cryptoapi
> # modprobe cipher-aes
> is the simplest way to show this.

Following up to my own question, it looks like the lock-up is occuring
in register_transform (in cryptoapi.c), sticking some debugs in:
        crypto_debug("going to lock\n");
        write_lock(&ti->t_group->tg_lock);
        crypto_debug("list_add\n");
        list_add(&ti->t_list, ti->t_group->tg_head);
        crypto_debug("going to unlock\n");
"going to lock" appears, and then the kernel locks up.

I'm not clear what the problem is though at the moment. I presume the
lock is a no-op on UP systems.


Andrew
-- 
Andrew McDonald
E-mail: andrew@mcdonald.org.uk
http://www.mcdonald.org.uk/andrew/

Linux-crypto:  cryptography in and on the Linux system
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