From: Russell King - ARM Linux <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
To: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
Cc: Pratyush Anand <panand-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Simon Horman <horms-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>,
Kees Cook <keescook-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH 2/2] arm: fix kernel image size
Date: Tue, 21 Jun 2016 10:47:38 +0100 [thread overview]
Message-ID: <20160621094737.GA5783@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20160621074319.GH22406-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
On Tue, Jun 21, 2016 at 12:43:21AM -0700, Tony Lindgren wrote:
> Hi,
>
> * Russell King <rmk-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org> [160617 12:52]:
> > If we want to assume that the compressed image will expand by a maximum
> > of 4x, we actually need to reserve 5x the space, since we need to keep
> > a copy of the compessed image around while decompressing.
>
> Looks like 5x is not enough with omap2plus_defconfig at least..
> This one needs to be set to 6x for that. Maybe we should just make
> it go all the way to 11 :)
That's not really what this commit is about - it's about making the
code consistent with the comments in the file. I could have instead
changed the comment saying "4x" to "3x" instead.
There isn't really an answer which will always work for this problem,
as I've already detailed in a previous thread discussing the issue.
Adding a zImage header don't fix the problem.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
WARNING: multiple messages have this Message-ID (diff)
From: linux@armlinux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] arm: fix kernel image size
Date: Tue, 21 Jun 2016 10:47:38 +0100 [thread overview]
Message-ID: <20160621094737.GA5783@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20160621074319.GH22406@atomide.com>
On Tue, Jun 21, 2016 at 12:43:21AM -0700, Tony Lindgren wrote:
> Hi,
>
> * Russell King <rmk@armlinux.org.uk> [160617 12:52]:
> > If we want to assume that the compressed image will expand by a maximum
> > of 4x, we actually need to reserve 5x the space, since we need to keep
> > a copy of the compessed image around while decompressing.
>
> Looks like 5x is not enough with omap2plus_defconfig at least..
> This one needs to be set to 6x for that. Maybe we should just make
> it go all the way to 11 :)
That's not really what this commit is about - it's about making the
code consistent with the comments in the file. I could have instead
changed the comment saying "4x" to "3x" instead.
There isn't really an answer which will always work for this problem,
as I've already detailed in a previous thread discussing the issue.
Adding a zImage header don't fix the problem.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Tony Lindgren <tony@atomide.com>
Cc: Pratyush Anand <panand@redhat.com>, Baoquan He <bhe@redhat.com>,
kexec@lists.infradead.org, Simon Horman <horms@verge.net.au>,
Kees Cook <keescook@google.com>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/2] arm: fix kernel image size
Date: Tue, 21 Jun 2016 10:47:38 +0100 [thread overview]
Message-ID: <20160621094737.GA5783@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20160621074319.GH22406@atomide.com>
On Tue, Jun 21, 2016 at 12:43:21AM -0700, Tony Lindgren wrote:
> Hi,
>
> * Russell King <rmk@armlinux.org.uk> [160617 12:52]:
> > If we want to assume that the compressed image will expand by a maximum
> > of 4x, we actually need to reserve 5x the space, since we need to keep
> > a copy of the compessed image around while decompressing.
>
> Looks like 5x is not enough with omap2plus_defconfig at least..
> This one needs to be set to 6x for that. Maybe we should just make
> it go all the way to 11 :)
That's not really what this commit is about - it's about making the
code consistent with the comments in the file. I could have instead
changed the comment saying "4x" to "3x" instead.
There isn't really an answer which will always work for this problem,
as I've already detailed in a previous thread discussing the issue.
Adding a zImage header don't fix the problem.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2016-06-21 9:47 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 19:44 [PATCH 0/2] Simple fix to the ARM kexec tools implementation Russell King - ARM Linux
2016-06-17 19:44 ` Russell King - ARM Linux
2016-06-17 19:44 ` [PATCH 1/2] arm: take account of TEXT_OFFSET for subsequent images Russell King
2016-06-17 19:44 ` Russell King
2016-06-17 19:44 ` [PATCH 2/2] arm: fix kernel image size Russell King
2016-06-17 19:44 ` Russell King
[not found] ` <E1bDzh4-0006a4-7p-yeZebKftTXNiEPTqdM/vLBqCBvEC6TWiNEsB0oqw8pBaa/9Udqfwiw@public.gmane.org>
2016-06-21 7:43 ` Tony Lindgren
2016-06-21 7:43 ` Tony Lindgren
2016-06-21 7:43 ` Tony Lindgren
[not found] ` <20160621074319.GH22406-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-06-21 9:47 ` Russell King - ARM Linux [this message]
2016-06-21 9:47 ` Russell King - ARM Linux
2016-06-21 9:47 ` Russell King - ARM Linux
[not found] ` <20160621094737.GA5783-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2016-06-21 10:38 ` Tony Lindgren
2016-06-21 10:38 ` Tony Lindgren
2016-06-21 10:38 ` Tony Lindgren
[not found] ` <20160621103810.GI22406-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-06-21 10:57 ` Tony Lindgren
2016-06-21 10:57 ` Tony Lindgren
2016-06-21 10:57 ` Tony Lindgren
[not found] ` <20160621105720.GK22406-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-06-21 15:44 ` Russell King - ARM Linux
2016-06-21 15:44 ` Russell King - ARM Linux
2016-06-21 15:44 ` Russell King - ARM Linux
[not found] ` <20160621154407.GB5783-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2016-06-21 16:55 ` Tony Lindgren
2016-06-21 16:55 ` Tony Lindgren
2016-06-21 16:55 ` Tony Lindgren
[not found] ` <20160621165523.GY22406-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-06-21 21:51 ` Russell King - ARM Linux
2016-06-21 21:51 ` Russell King - ARM Linux
2016-06-21 21:51 ` Russell King - ARM Linux
[not found] ` <20160621215141.GC5783-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2016-06-22 7:36 ` Tony Lindgren
2016-06-22 7:36 ` Tony Lindgren
2016-06-22 7:36 ` Tony Lindgren
[not found] ` <20160622073614.GZ22406-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2016-06-22 8:29 ` Russell King - ARM Linux
2016-06-22 8:29 ` Russell King - ARM Linux
2016-06-22 8:29 ` Russell King - ARM Linux
[not found] ` <20160622082958.GD5783-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2016-06-22 8:51 ` Tony Lindgren
2016-06-22 8:51 ` Tony Lindgren
2016-06-22 8:51 ` Tony Lindgren
2016-06-21 11:02 ` Mason
2016-06-21 6:11 ` [PATCH 0/2] Simple fix to the ARM kexec tools implementation Pratyush Anand
2016-06-21 6:11 ` Pratyush Anand
2016-06-21 8:20 ` Russell King - ARM Linux
2016-06-21 8:20 ` Russell King - ARM Linux
2016-06-23 0:41 ` Simon Horman
2016-06-23 0:41 ` Simon Horman
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