Resolves: https://issues.redhat.com/browse/RHEL-7028
Currently, nfs dumping fails on some machines that has a dedicated PHY driver (dealing with the physical layer) or MDIO bus (connecting the MAC to PHY devices) driver. This is because kexec-tools doesn't install dedicated PHY or MDIO driver explicitly and the NIC driver don't specify the dependency on the needed PHY or MDIO driver. So when the dependency on a PHY driver or MDIO driver is not found by dracut's instmods, the PHY or MDIO driver won't be installed.
This patch passes =drivers/net/phy and =drivers/net/mdio to dracut's instmods which will only install in-use PHY or MDIO driver(s).
Note ideally we should find out which PHY driver is used by a NIC but unfortunately currently no universal way can be found (/sys/class/net/NIC_NAME/device/driver/module can be used to find the name of the PHY driver for some NICs but it doesn't exist for some NICs like Qualcomm Atheros AR8031). So is it for a MDIO bus driver. Fortunately currently no huge memory consumption is found for a PHY or MDIO driver.
Fixes: a65dde2d ("Reduce kdump memory consumption by only installing needed NIC drivers") Reported-by: Doreen Alongi dalongi@redhat.com Signed-off-by: Coiby Xu coxu@redhat.com --- dracut-module-setup.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh index ff53d084..905e6fbd 100755 --- a/dracut-module-setup.sh +++ b/dracut-module-setup.sh @@ -381,7 +381,7 @@ _get_hpyerv_physical_driver() { kdump_install_nic_driver() { local _netif _driver _drivers
- _drivers=() + _drivers=('=drivers/net/phy' '=drivers/net/mdio')
for _netif in $1; do [[ $_netif == lo ]] && continue