From: "H. Peter Anvin" <hpa@zytor.com>
To: Shaun Ruffell <sruffell@digium.com>, Vivek Goyal <vgoyal@redhat.com>
Cc: mjg59@srcf.ucam.org, bhe@redhat.com, greg@kroah.com,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
bp@alien8.de, ebiederm@xmission.com, akpm@linux-foundation.org,
dyoung@redhat.com, chaowang@redhat.com
Subject: Re: [PATCH 11/15] purgatory: Core purgatory functionality
Date: Mon, 11 Aug 2014 10:51:10 -0700 [thread overview]
Message-ID: <53E9028E.2070709@zytor.com> (raw)
In-Reply-To: <20140811174017.GD12610@digium.com>
On 08/11/2014 10:40 AM, Shaun Ruffell wrote:
> FYI, it looks like the following patch (committed in
> 8fc5b4d4121c95482b2583) adds a new requirement to use at least gcc
> 4.4 to build the kernel?
Well, to build the kernel with that particular new functionality
enabled, yes.
However...
> The above "-mcmodel=large" compiler flag produces the following output on GCC 4.1.2.
>
> $ make modules_prepare ; gcc --version
> CHK include/config/kernel.release
> CHK include/generated/uapi/linux/version.h
> CHK include/generated/utsrelease.h
> CC arch/x86/purgatory/purgatory.o
> arch/x86/purgatory/purgatory.c:1: sorry, unimplemented: code model ‘large’ not supported yet
> make[1]: *** [arch/x86/purgatory/purgatory.o] Error 1
> make: *** [archprepare] Error 2
> gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-54)
> Copyright (C) 2006 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> I did a quick search for a discussion the indicates this compiler is now
> officially too old to build the kernel but did not find one.
>
> If this is required, maybe Documentation/Changes needs to be updated
> with the new minimum required version?
... I'm having a very, very hard time to picture a reason why the
"large" model would be necessary or even desirable for the purgatory
code. The "small PIC" model seem to fit much better...
-hpa
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next prev parent reply other threads:[~2014-08-11 17:52 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-26 20:33 [PATCH 00/15][V4] kexec: A new system call to allow in kernel loading Vivek Goyal
2014-06-26 20:33 ` [PATCH 01/15] bin2c: Move bin2c in scripts/basic Vivek Goyal
2014-06-26 20:33 ` [PATCH 02/15] kernel: Build bin2c based on config option CONFIG_BUILD_BIN2C Vivek Goyal
2014-06-26 20:33 ` [PATCH 03/15] kexec: rename unusebale_pages to unusable_pages Vivek Goyal
2014-06-26 20:33 ` [PATCH 04/15] kexec: Move segment verification code in a separate function Vivek Goyal
2014-06-26 20:33 ` [PATCH 05/15] kexec: Use common function for kimage_normal_alloc() and kimage_crash_alloc() Vivek Goyal
2014-06-26 20:33 ` [PATCH 06/15] resource: Provide new functions to walk through resources Vivek Goyal
2014-06-26 20:33 ` [PATCH 07/15] kexec: Make kexec_segment user buffer pointer a union Vivek Goyal
2014-06-26 20:33 ` [PATCH 08/15] kexec: New syscall kexec_file_load() declaration Vivek Goyal
2014-06-26 20:43 ` Vivek Goyal
2014-06-26 21:03 ` Andy Lutomirski
2014-06-27 11:50 ` Vivek Goyal
2014-06-27 12:20 ` Michael Kerrisk (man-pages)
2014-06-26 20:33 ` [PATCH 09/15] kexec: Implementation of new syscall kexec_file_load Vivek Goyal
2014-06-26 20:58 ` Andrew Morton
2014-06-27 16:31 ` Vivek Goyal
2014-07-01 20:25 ` Vivek Goyal
2014-06-26 20:33 ` [PATCH 10/15] purgatory/sha256: Provide implementation of sha256 in purgaotory context Vivek Goyal
2014-06-26 20:33 ` [PATCH 11/15] purgatory: Core purgatory functionality Vivek Goyal
2014-08-11 17:40 ` Shaun Ruffell
2014-08-11 17:51 ` H. Peter Anvin [this message]
2014-08-11 18:02 ` Vivek Goyal
2014-08-11 18:08 ` H. Peter Anvin
2014-08-11 18:15 ` Vivek Goyal
2014-08-11 20:23 ` Vivek Goyal
2014-06-26 20:33 ` [PATCH 12/15] kexec: Load and Relocate purgatory at kernel load time Vivek Goyal
2014-06-26 20:33 ` [PATCH 13/15] kexec-bzImage64: Support for loading bzImage using 64bit entry Vivek Goyal
2014-06-26 20:33 ` [PATCH 14/15] kexec: Support for kexec on panic using new system call Vivek Goyal
2014-06-26 20:33 ` [PATCH 15/15] kexec: Support kexec/kdump on EFI systems Vivek Goyal
2014-07-01 19:46 ` Matt Fleming
2014-07-01 20:14 ` Andrew Morton
2014-07-01 20:21 ` Vivek Goyal
2014-07-01 21:23 ` Matt Fleming
2014-07-01 20:09 ` [PATCH 17/15] kexec-bzimage: Change EFI helper function names Vivek Goyal
2014-06-26 20:39 ` [PATCH 00/15][V4] kexec: A new system call to allow in kernel loading Vivek Goyal
2014-06-26 20:58 ` Andrew Morton
2014-06-26 21:21 ` Borislav Petkov
2014-06-27 11:33 ` Vivek Goyal
2014-06-27 16:34 ` [PATCH 16/15] kexec: Fix freeing up for image loader data loading Vivek Goyal
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