From: baruch@tkos•co.il (Baruch Siach)
To: linux-arm-kernel@lists•infradead.org
Subject: [patch 0/2] ARM: Disable outer cache before kexec call -V3
Date: Wed, 4 Aug 2010 10:00:29 +0300 [thread overview]
Message-ID: <20100804070029.GD17208@jasper.tkos.co.il> (raw)
In-Reply-To: <4C590CBD.1080305@swapp-eng.it>
Hi Andrea,
On Wed, Aug 04, 2010 at 08:46:21AM +0200, Andrea Paterniani wrote:
> Il 03/08/2010 19.36, Gadiyar, Anand ha scritto:
> >Andrea Paterniani wrote:
> >>Hi,
> >> I have applied your patches to kernel 2.6.35-rc4 running on my beagleboard.
> >>I'm using kexec-tools-2.0.1.
> >>
> >>My u-boot bootargs is:
> >> console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait ip=192.168.2.13::255.255.255.0
> >>
> >>To restart the system I type:
> >> > sync
> >> > kexec -l /boot/zImage --append="console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait ip=192.168.2.13::255.255.255.0"
> >> > kexec -e
> >>
> >>Not every time the system restart.
> >>In some cases no output on the console after the following:
> >> Bye!
> >> Uncompressing Linux... done, booting the kernel.
> >>
> >>Any idea?
> >>
> >Can you try building your kernel with CONFIG_EARLY_PRINTK,
> >and add the word "earlyprintk" to your bootargs?
> >
> How to enable EARLY_PRINTK for ARM architecture?
> Browsing kernel source I find arch/arm/kernel/early_printk.c but no
> way to enable CONFIG_EARLY_PRINTK from make menuconfig.
> Is there any patch to have this config option for ARM?
EARLY_PRINTK is in arch/arm/Kconfig.debug. It depends on DEBUG_LL, though. So
you must enable DEBUG_LL to make EARLY_PRINTK visible.
baruch
>
> - Andrea
> >
> >>Il 05/07/2010 13.52, Thomas Gleixner ha scritto:
> >>>The following patch series addresses the problem that the kexec code
> >>>does not disable the outer cache before disabling the inner cache and
> >>>jumping into the new kernel. This results in random crashes of the new
> >>>kernel.
> >>>
> >>>Changes since version 2:
> >>>
> >>> - Use CLEAN_INV_WAY in l2x0_flush_all according to Catalin
> >>>
> >>> - Rename outer_cache_disable() to outer_disable()
> >>>
> >>> - Added a BUG_ON() when l2x0_inv_all() is called with L2 enabled.
> >>>
> >>>Thanks,
> >>>
> >>> tglx
--
~. .~ Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
- baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
next prev parent reply other threads:[~2010-08-04 7:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-05 11:52 [patch 0/2] ARM: Disable outer cache before kexec call -V3 Thomas Gleixner
2010-07-05 11:52 ` [patch 1/2] arm: Disable outer (L2) cache in kexec Thomas Gleixner
2010-07-05 12:11 ` Catalin Marinas
2010-07-05 11:52 ` [patch 2/2] arm: Implement l2x0 cache disable functions Thomas Gleixner
2010-07-05 12:13 ` Catalin Marinas
2010-08-03 12:44 ` Linus Walleij
2010-08-03 14:20 ` [patch 0/2] ARM: Disable outer cache before kexec call -V3 Andrea Paterniani
2010-08-03 17:36 ` Gadiyar, Anand
2010-08-04 6:46 ` Andrea Paterniani
2010-08-04 6:50 ` Shilimkar, Santosh
2010-08-04 7:00 ` Baruch Siach [this message]
2010-08-04 9:19 ` Andrea Paterniani
2010-08-06 6:16 ` Andrea Paterniani
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100804070029.GD17208@jasper.tkos.co.il \
--to=baruch@tkos$(echo .)co.il \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox