`du' and `updatedb' may cause small time loss in 2.3.3*

Paul Kimoto (kimoto@lightlink.com)
Sat, 18 Dec 1999 01:19:57 -0500

I have two Intel Pentium (IDE) boxes running kernels 2.3.{32,33}
and NTP, with {64,48} MB RAM. Sometimes I run ~minute-long `du'
or `updatedb' jobs, which cause a lot of disk activity.
Afterwards, the NTP programs report that the machine has lost
a bit of time: a previously synchronized box will lag its time
source (by some significant fraction of a second).

In the NTP log files, I see the NTP daemon reset the clock
overnight, after daily `updatedb' cron jobs. It looks like this
did not happen with 2.3.28 (or with 2.2.*), but it did with
2.3.30-pre3.

Appended is (the non-comment part of) one machine's .config file.
Please e-mail to tell me what else is worth knowing.

-Paul <kimoto@lightlink.com>

CONFIG_X86=y
CONFIG_ISA=y
CONFIG_EXPERIMENTAL=y
CONFIG_M586TSC=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_TSC=y
CONFIG_NOHIGHMEM=y
CONFIG_MODULES=y
CONFIG_KMOD=y
CONFIG_NET=y
CONFIG_PCI=y
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_NAMES=y
CONFIG_SYSVIPC=y
CONFIG_SYSCTL=y
CONFIG_KCORE_ELF=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_PARPORT=y
CONFIG_PARPORT_PC=y
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=m
CONFIG_BLK_DEV_CMD640=y
CONFIG_BLK_DEV_CMD640_ENHANCED=y
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_IDEDMA_PCI_EXPERIMENTAL=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDEDMA_AUTO=y
CONFIG_BLK_DEV_RAM=m
CONFIG_PARIDE_PARPORT=y
CONFIG_BLK_DEV_IDE_MODES=y
CONFIG_PACKET=m
CONFIG_NETFILTER=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_SYN_COOKIES=y
CONFIG_SKB_LARGE=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_EISA=y
CONFIG_DE4X5=m
CONFIG_DEC_ELCP=m
CONFIG_PLIP=m
CONFIG_PPP=y
CONFIG_PPP_ASYNC=y
CONFIG_PPP_DEFLATE=m
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=256
CONFIG_PRINTER=m
CONFIG_MOUSE=y
CONFIG_PSMOUSE=y
CONFIG_ACPI=y
CONFIG_AUTOFS_FS=m
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_ISO9660_FS=m
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=m
CONFIG_EXT2_FS=y
CONFIG_NFS_FS=m
CONFIG_SUNRPC=m
CONFIG_LOCKD=m
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_ISO8859_1=m
CONFIG_VGA_CONSOLE=y
CONFIG_SOUND=m
CONFIG_SOUND_OSS=m
CONFIG_SOUND_SB=m

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