linux-kernel - Re: [PATCH -rt] update kmap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1167256455.14081.51.camel@imap.mvista.com>
Date:	Wed, 27 Dec 2006 13:54:15 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -rt] update kmap_atomic on !HIGHMEM

On Wed, 2006-12-27 at 22:25 +0100, Ingo Molnar wrote:
> 
> +void pagefault_disable(void)
> +{
> +       current->pagefault_disabled++;
> +       /*
> +        * make sure to have issued the store before a pagefault
> +        * can hit.
> +        */
> +       barrier();
> +}
> +
> +void pagefault_enable(void)
> +{
> +       /*
> +        * make sure to issue those last loads/stores before enabling
> +        * the pagefault handler again.
> +        */
> +       barrier();
> +       current->pagefault_disabled--;
> +}
> +

I'll test it, but clearly I'm not going to get the same scheduling while
atomic using this change.. So may as well just put it in -rt and see if
something crashes ..

Daniel

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/