From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
To: Dimitri John Ledkov <xnox@ubuntu.com>
Cc: linux-s390@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH] s390: fix zfcpdump_defconfig failing to perform zfcpdump
Date: Fri, 13 Oct 2017 10:28:59 +0200 [thread overview]
Message-ID: <20171013102859.7e603a48@TP-holzheu> (raw)
In-Reply-To: <1507804646-6197-1-git-send-email-xnox@ubuntu.com>
Am Thu, 12 Oct 2017 11:37:26 +0100
schrieb Dimitri John Ledkov <xnox@ubuntu.com>:
> zipl from s390-tools generates root=/dev/ram0 kernel cmdline for
> zfcpdump, thus BLK_DEV_RAM is required.
>
> zfcpdump initrd mounts DEBUG_FS, thus it is also required.
>
> Without above two options kernel images built with zfcpdump_defconfig
> fail to perform zfcpdump. Affects v4.10+.
>
> Bug-Ubuntu: https://launchpad.net/bugs/1722735
> Bug-Ubuntu: https://launchpad.net/bugs/1719290
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Dimitri John Ledkov <xnox@ubuntu.com>
> ---
> arch/s390/configs/zfcpdump_defconfig | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
> index afa46a7..04e042e 100644
> --- a/arch/s390/configs/zfcpdump_defconfig
> +++ b/arch/s390/configs/zfcpdump_defconfig
> @@ -27,6 +27,7 @@ CONFIG_NET=y
> CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
> CONFIG_DEVTMPFS=y
> # CONFIG_FIRMWARE_IN_KERNEL is not set
> +CONFIG_BLK_DEV_RAM=y
In https://launchpad.net/bugs/1722735 was reported that the ramdisk
problem was introduced with kernel 4.10. But to me it looks like
the kernel config option CONFIG_BLK_DEV_RAM is also not there in
kernel 4.9:
linux-master ((v4.10))$ git checkout v4.9
Previous HEAD position was c8d2bc9bc39e... Linux 4.8
HEAD is now at 69973b830859... Linux 4.9
linux-master ((v4.9))$ make zfcpdump_defconfig
HOSTCC scripts/basic/fixdep
#
# configuration written to .config
#
linux-master ((v4.9))$ grep CONFIG_BLK_DEV_RA .config
# CONFIG_BLK_DEV_RAM is not set
Regards
Michael
next prev parent reply other threads:[~2017-10-13 8:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-12 10:37 [PATCH] s390: fix zfcpdump_defconfig failing to perform zfcpdump Dimitri John Ledkov
2017-10-13 8:28 ` Michael Holzheu [this message]
2017-10-13 13:36 ` Dimitri John Ledkov
2017-10-16 9:24 ` Michael Holzheu
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