Oh, I should also mention that when I [binary] patched the `grub-probe` binary to skip the BLKFLSBUF ioctls, everything else was _MUCH_ faster. Transcript:
# export TIME="%e real %U user %S sys" # for what in fs fs_uuid drive device partmap; do > /usr/bin/time /usr/sbin/grub-probe --device /dev/sda3 --target=$what > done ext2 9.19 real 0.00 user 0.15 sys 4f0c55b5-6bc6-40a4-b239-f0918b84d57c 10.89 real 0.00 user 0.21 sys (hd0,3) 2.05 real 0.00 user 0.02 sys /dev/sda3 2.18 real 0.00 user 0.01 sys part_msdos 2.66 real 0.00 user 0.05 sys # for what in fs fs_uuid drive device partmap; do > /usr/bin/time /tmp/grub-probe --device /dev/sda3 --target=$what > done ext2 0.03 real 0.00 user 0.00 sys 4f0c55b5-6bc6-40a4-b239-f0918b84d57c 0.00 real 0.00 user 0.00 sys (hd0,3) 0.00 real 0.00 user 0.00 sys /dev/sda3 0.00 real 0.00 user 0.00 sys part_msdos 0.00 real 0.00 user 0.00 sys # mount | grep sda3 /dev/sda3 on / type ext4 (rw,errors=remount-ro) # diff -up <(objdump -d /usr/sbin/grub-probe) <(objdump -d /tmp/grub-probe) --- /dev/fd/63 2009-12-11 14:21:05.687644648 -0800 +++ /dev/fd/62 2009-12-11 14:21:05.696688380 -0800 @@ -1,5 +1,5 @@ -/usr/sbin/grub-probe: file format elf64-x86-64 +/tmp/grub-probe: file format elf64-x86-64 Disassembly of section .init: @@ -1480,7 +1480,7 @@ Disassembly of section .text: 402807: 0f 88 5e 02 00 00 js 402a6b <ffl...@plt+0x13c3> 40280d: 31 d2 xor %edx,%edx 40280f: 89 c7 mov %eax,%edi - 402811: be 61 12 00 00 mov $0x1261,%esi + 402811: be 5e 12 00 00 mov $0x125e,%esi 402816: 31 c0 xor %eax,%eax 402818: e8 8b eb ff ff callq 4013a8 <io...@plt> 40281d: 85 db test %ebx,%ebx # grep x12.9[47] /usr/src/linux-headers-`uname -r`/include/linux/fs.h #define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */ #define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */ -- GRUB installation fails if installing to certain non-ext3 filesystems https://bugs.launchpad.net/bugs/185878 You received this bug notification because you are a member of Kubuntu Bugs, which is a subscriber of a duplicate bug. -- kubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
