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John Sperbeck
8434f9aa6b
If a member of a cpio archive for an initrd or initrams is larger than 2Gb, we'll eventually fail to write to that file when we get to that limit, unless O_LARGEFILE is set. The problem can be seen with this recipe, assuming that BLK_DEV_RAM is not configured: cd /tmp dd if=/dev/zero of=BIGFILE bs=1048576 count=2200 echo BIGFILE | cpio -o -H newc -R root:root > initrd.img kexec -l /boot/vmlinuz-$(uname -r) --initrd=initrd.img --reuse-cmdline kexec -e The console will show 'Initramfs unpacking failed: write error'. With the patch, the error is gone. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Sperbeck <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Nick Desaulniers <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]>