Attachment 305525 Details for Bug 446279 – fix race condition on kdump boot

[patch] fix race condition on kdump boot

mkdumprd-module-loading.patch (text/plain), 3.13 KB, created by Doug Chapman on 2008-05-15 19:13:28 UTC

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Creator: Doug Chapman

Created: 2008-05-15 19:13:28 UTC

Size: 3.13 KB

patch

obsolete

>*** mkdumprd.broken	2008-05-14 16:15:15.000000000 -0400
>--- mkdumprd	2008-05-15 11:03:03.000000000 -0400
>*************** if [ -n "$needusb" -a "x$PROBE" == "xyes
>*** 684,720 ****
>      fi
>  fi
>  
>- if [ -n "$forcescsi" -o -z "$noscsi" -a "x$PROBE" == "xyes" ]; then
>-     if [ ! -f $modulefile ]; then
>-         modulefile=/etc/conf.modules
>-     fi
>- 
>-     if [ -f $modulefile ]; then
>- 	scsimodules=`grep "alias[[:space:]]\+scsi_hostadapter" $modulefile | grep -v '^[ 	]*#' | LC_ALL=C sort -u | awk '{ print $3 }'`
>- 
>- 	if [ -n "$scsimodules" ]; then
>-             for n in $scsimodules; do
>-     # for now allow scsi modules to come from anywhere.  There are some
>-     # RAID controllers with drivers in block/
>- 		findmodule $n
>- 	    done
>- 	fi
>-     fi
>- fi
>- 
>- # If we have ide devices and module ide, do the right thing
>- ide=/proc/ide/ide*
>- if [ -n "$forceide" -o -n "$ide" -a "x$PROBE" == "xyes" ]; then
>-     findmodule -ide-disk
>- fi
>- 
>- # If we have dasd devices, include the necessary modules (S/390)
>- if [ "x$PROBE" == "xyes" -a -d /proc/dasd ]; then
>-     findmodule -dasd_mod
>-     findmodule -dasd_eckd_mod
>-     findmodule -dasd_fba_mod
>- fi
>- 
>  if [ "x$PROBE" == "xyes" ]; then
>      rootfs=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $3; }}' $fstab)
>      rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' $fstab)
>--- 684,689 ----
>*************** if [ "x$PROBE" == "xyes" ]; then
>*** 758,763 ****
>--- 727,765 ----
>      fi
>  fi
>  
>+ 
>+ if [ -n "$forcescsi" -o -z "$noscsi" -a "x$PROBE" == "xyes" ]; then
>+     if [ ! -f $modulefile ]; then
>+         modulefile=/etc/conf.modules
>+     fi
>+ 
>+     if [ -f $modulefile ]; then
>+ 	scsimodules=`grep "alias[[:space:]]\+scsi_hostadapter" $modulefile | grep -v '^[ 	]*#' | LC_ALL=C sort -u | awk '{ print $3 }'`
>+ 
>+ 	if [ -n "$scsimodules" ]; then
>+             for n in $scsimodules; do
>+     # for now allow scsi modules to come from anywhere.  There are some
>+     # RAID controllers with drivers in block/
>+ 		findmodule $n
>+ 	    done
>+ 	fi
>+     fi
>+ fi
>+ 
>+ # If we have ide devices and module ide, do the right thing
>+ ide=/proc/ide/ide*
>+ if [ -n "$forceide" -o -n "$ide" -a "x$PROBE" == "xyes" ]; then
>+     findmodule -ide-disk
>+ fi
>+ 
>+ # If we have dasd devices, include the necessary modules (S/390)
>+ if [ "x$PROBE" == "xyes" -a -d /proc/dasd ]; then
>+     findmodule -dasd_mod
>+     findmodule -dasd_eckd_mod
>+     findmodule -dasd_fba_mod
>+ fi
>+ 
>+ 
>  # If we use LVM or dm-based raid, include dm-mod
>  # XXX: dm not really supported yet.
>  testdm=""
>*************** EOF
>*** 1448,1453 ****
>--- 1450,1471 ----
>      fi
>  done
>  
>+ cat >> $MNTIMAGE/init << EOF
>+ if [ -f /proc/scsi/scsi ]
>+ then
>+     echo "Waiting for scsi driver initialization"
>+     LAST_FVAL=0
>+     FVAL=\`md5sum /proc/scsi/scsi\`
>+     while [ "\$LAST_FVAL" != "\$FVAL" ]
>+     do
>+         LAST_FVAL=\$FVAL
>+         #wait half a second and check again
>+         usleep 500000
>+         FVAL=\`md5sum /proc/scsi/scsi\`
>+     done
>+ fi
>+ EOF
>+  
>  # HACK: module loading + device creation isn't necessarily synchronous...
>  # this will make sure that we have all of our devices before trying
>  # things like RAID or LVM

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Attachments on bug 446279: 305363 | 305402 | 305525 | 305717