Subject: Re: 2.6.12-rc3-mm1
From: Alexander Nyberg <alexn@dsv.su.se>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <20050429231653.32d2f091.akpm@osdl.org>
References: <20050429231653.32d2f091.akpm@osdl.org>
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Date: Sat, 30 Apr 2005 13:10:58 +0200
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> - We're still miles away from 2.6.12.  Lots of patches here, plus my
>   collection of bugs-post-2.6.11 is vast.  I'll start working through them
>   again after 2.6.12-rc4 is available to testers.
> 

Something is bad with my init process, so with debug patch below I'm
getting:
do_page_fault: force_sig_info SIGSEV to 1, addr ffffe018, eip b7fe576a
do_page_fault: force_sig_info SIGSEV to 1, addr ffffe018, eip b7fe576a
do_page_fault: force_sig_info SIGSEV to 1, addr ffffe018, eip b7fe576a
do_page_fault: force_sig_info SIGSEV to 1, addr ffffe018, eip b7fe576a

continuing forever. 0xffffe018 is inside the vsyscall page so could be
related but the eip should be there too in that case I think...
You have any candidates? I've failed to find any.

Index: mm/arch/i386/mm/fault.c
===================================================================
--- mm.orig/arch/i386/mm/fault.c	2005-04-30 12:49:17.000000000 +0200
+++ mm/arch/i386/mm/fault.c	2005-04-30 12:56:31.000000000 +0200
@@ -391,6 +391,8 @@
 		info.si_errno = 0;
 		/* info.si_code has been set above */
 		info.si_addr = (void __user *)address;
+		printk("%s: force_sig_info SIGSEV to %d, addr %lx, eip %lx\n",
+				__FUNCTION__, tsk->pid, address, regs->eip);
 		force_sig_info(SIGSEGV, &info, tsk);
 		return;
 	}


Also, this brought me to trying to find what has changed between the
versions which appears a little tricky. Do you think it would be
possible to set up your scripts that currently notify the author of a
patch about the inclusion to CC something like mm-commits list.

That way people can audit patches that have got in before the tarball is
released, it is easy to see what has gone in and when.

-
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