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SubjectRe: linux 2.2.19pre and thttpd (VM-global problem?)
Andrea Arcangeli wrote:

> I need to know exactly which kernel sources you were using (and also the
> compiler of course ;)

At the moment it is 2.2.18 + all pathces that can be found at
www.linuxraid.org and ide patch 2.2.18.1221, but i first spotted this
problem on a similary configured 2.2.17 with VM-global patch 3. gcc
--version returns egcs-2.91.66. The box is an old p200mmx with 128mb ram
running redhat 6.0 with lots of patches and customisations ... glibc rpm
packet is glibc-2.1.3-21.

Sample vmstat output:
procs memory swap io
system cpu
r b w swpd free buff cache si so bi bo in cs us
sy id
0 0 0 5804 2716 2624 92188 3 1 50 9 446 441
7 3 90

Straceing the server shows that it indeed quits after a munmap:

[snip]
select(9, [5], [6 7 8], NULL, {72, 164000}) = 1 (out [7], left {71,
960000})
gettimeofday({978077877, 462325}, NULL) = 0
write(7, "\364\362\222\210\311\336\323\206"..., 243498437) = 20272
select(9, [5], [6 7 8], NULL, {71, 944000}) = 1 (in [5], left {71,
770000})
gettimeofday({978077877, 645302}, NULL) = 0
accept(5, {sin_family=AF_INET, sin_port=htons(1444),
sin_addr=inet_addr("24.11.189.33")}, [16]) = 9
fcntl(9, F_SETFD, FD_CLOEXEC) = 0
fcntl(9, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(9, F_SETFL, O_RDWR|O_NONBLOCK) = 0
brk(0x8079000) = 0x8078000
brk(0x8079000) = 0x8078000
time([978077877]) = 978077877
getpid() = 22024
send(3, "<26>Dec 29 09:17:57 thttpd[22024"..., 68, 0) = 68
munmap(0x125000, 4096) = 0
_exit(1) = ?

Hmm ... this looks like it dies when another request comes in when one
download is already in progress ... let me try again:
[snip]
select(7, [5], [6], NULL, {98, 652000}) = 1 (out [6], left {98, 560000})
gettimeofday({978078108, 982991}, NULL) = 0
write(6, "O\327\372R\220\354r\317[\231T\0\340"..., 246365477) = 15928
select(7, [5], [6], NULL, {98, 547000}) = 1 (in [5], left {98, 210000})
gettimeofday({978078109, 324744}, NULL) = 0
accept(5, {sin_family=AF_INET, sin_port=htons(3687),
sin_addr=inet_addr("62.76.36.242")}, [16]) = 7
fcntl(7, F_SETFD, FD_CLOEXEC) = 0
fcntl(7, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(7, F_SETFL, O_RDWR|O_NONBLOCK) = 0
brk(0x8078000) = 0x8077000
brk(0x8078000) = 0x8077000
time([978078109]) = 978078109
getpid() = 22061
send(3, "<27>Dec 29 09:21:49 thttpd[22061"..., 69, 0) = 69
munmap(0x125000, 4096) = 0
_exit(1) = ?

Am i right? My IP was 213.143.68.212 in both runs.

I just tried the 'echo 1 >/proc/sys/vm/overcommit_memory' trick ... and
no, it's still dieing at about the same rate.

My .config on 2.2.18-cdhs :

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y

#
# Processor type and features
#
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
CONFIG_M586TSC=y
# CONFIG_M686 is not set
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_TSC=y
# CONFIG_MICROCODE is not set
CONFIG_X86_MSR=m
CONFIG_X86_CPUID=m
CONFIG_1GB=y
# CONFIG_2GB is not set
# CONFIG_MATH_EMULATION is not set
CONFIG_MTRR=y
# CONFIG_SMP is not set

#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODVERSIONS=y
CONFIG_KMOD=y
#
# General setup
#
CONFIG_NET=y
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_OPTIMIZE is not set
CONFIG_PCI_OLD_PROC=y
# CONFIG_MCA is not set
# CONFIG_VISWS is not set
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
# CONFIG_BINFMT_JAVA is not set
# CONFIG_PARPORT is not set
# CONFIG_APM is not set
# CONFIG_TOSHIBA is not set

#
# Plug and Play support
#
# CONFIG_PNP is not set

#
# Block devices
#
CONFIG_BLK_DEV_FD=m
CONFIG_BLK_DEV_IDE=y
# CONFIG_BLK_DEV_HD_IDE is not set
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
# CONFIG_IDEDISK_STROKE is not set
CONFIG_BLK_DEV_IDECD=m
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_IDE_TASK_IOCTL is not set
# CONFIG_PKT_TASK_IOCTL is not set
# CONFIG_IDE_TASK_IOCTL_DEBUG is not set
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_RZ1000 is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDEDMA_AUTO=y
# CONFIG_IDEDMA_NEW_DRIVE_LISTINGS is not set
CONFIG_IDEDMA_PCI_EXPERIMENTAL=y
# CONFIG_IDEDMA_PCI_WIP is not set
CONFIG_BLK_DEV_OFFBOARD=y
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD7409 is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_CY82C693 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT34X is not set
CONFIG_BLK_DEV_HPT366=y
CONFIG_BLK_DEV_PIIX=y
CONFIG_PIIX_TUNING=y
# CONFIG_BLK_DEV_OPTI621 is not set
# CONFIG_BLK_DEV_PDC202XX is not set
# CONFIG_BLK_DEV_SIS5513 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_OSB4 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_IDE_CHIPSETS is not set
# CONFIG_IDEDMA_IVB is not set
CONFIG_BLK_DEV_LOOP=m
# CONFIG_BLK_DEV_NBD is not set
CONFIG_BLK_DEV_MD=y
CONFIG_AUTODETECT_RAID=y
CONFIG_MD_LINEAR=y
CONFIG_MD_STRIPED=y
CONFIG_MD_MIRRORING=y
CONFIG_MD_RAID5=y
# CONFIG_MD_TRANSLUCENT is not set
# CONFIG_MD_HSM is not set
CONFIG_MD_BOOT=y
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_SIZE=4096
# CONFIG_BLK_DEV_XD is not set
# CONFIG_BLK_DEV_DAC960 is not set
CONFIG_PARIDE_PARPORT=y
# CONFIG_PARIDE is not set
CONFIG_BLK_DEV_IDE_MODES=y
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_HD is not set

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_NETLINK=y
CONFIG_RTNETLINK=y
CONFIG_NETLINK_DEV=y
CONFIG_FIREWALL=y
CONFIG_FILTER=y
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
CONFIG_IP_FIREWALL=y
CONFIG_IP_FIREWALL_NETLINK=y
CONFIG_NETLINK_DEV=y
# CONFIG_IP_TRANSPARENT_PROXY is not set
# CONFIG_IP_MASQUERADE is not set
# CONFIG_IP_ROUTER is not set
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE=m
CONFIG_IP_ALIAS=y
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
# CONFIG_INET_RARP is not set
CONFIG_SKB_LARGE=y
# CONFIG_IPV6 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_LLC is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_FASTROUTE is not set
# CONFIG_NET_HW_FLOWCONTROL is not set
# CONFIG_CPU_IS_SLOW is not set

#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set

#
# Telephony Support
#
# CONFIG_PHONE is not set
# CONFIG_PHONE_IXJ is not set

#
# SCSI support
#
# CONFIG_SCSI is not set

#
# I2O device support
#
# CONFIG_I2O is not set
# CONFIG_I2O_PCI is not set
# CONFIG_I2O_BLOCK is not set
# CONFIG_I2O_SCSI is not set

#
# Network device support
#
CONFIG_NETDEVICES=y

#
# ARCnet devices
#
# CONFIG_ARCNET is not set
CONFIG_DUMMY=m
CONFIG_BONDING=m
# CONFIG_EQUALIZER is not set
# CONFIG_ETHERTAP is not set
# CONFIG_NET_SB1000 is not set

#
# Ethernet (10 or 100Mbit)
#
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
# CONFIG_EL1 is not set
# CONFIG_EL2 is not set
# CONFIG_ELPLUS is not set
# CONFIG_EL16 is not set
CONFIG_EL3=m
# CONFIG_3C515 is not set
CONFIG_VORTEX=m
# CONFIG_LANCE is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_NET_VENDOR_RACAL is not set
# CONFIG_RTL8139 is not set
# CONFIG_RTL8139TOO is not set
# CONFIG_NET_ISA is not set
CONFIG_NET_EISA=y
# CONFIG_PCNET32 is not set
# CONFIG_AC3200 is not set
# CONFIG_APRICOT is not set
# CONFIG_CS89x0 is not set
# CONFIG_DM9102 is not set
# CONFIG_DE4X5 is not set
# CONFIG_DEC_ELCP is not set
# CONFIG_DEC_ELCP_OLD is not set
# CONFIG_DGRS is not set
CONFIG_EEXPRESS_PRO100=m
# CONFIG_LNE390 is not set
# CONFIG_NE3210 is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_TLAN is not set
# CONFIG_VIA_RHINE is not set
# CONFIG_SIS900 is not set
# CONFIG_ES3210 is not set
# CONFIG_EPIC100 is not set
# CONFIG_ZNET is not set
# CONFIG_NET_POCKET is not set

#
# Ethernet (1000 Mbit)
#
# CONFIG_ACENIC is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_SK98LIN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_RADIO is not set

#
# Token ring devices
#
# CONFIG_TR is not set
# CONFIG_NET_FC is not set
# CONFIG_RCPCI is not set
# CONFIG_SHAPER is not set

#
# Wan interfaces
#
# CONFIG_HOSTESS_SV11 is not set
# CONFIG_COSA is not set
# CONFIG_SEALEVEL_4021 is not set
# CONFIG_SYNCLINK_SYNCPPP is not set
# CONFIG_LANMEDIA is not set
# CONFIG_COMX is not set
# CONFIG_HDLC is not set
# CONFIG_DLCI is not set
# CONFIG_XPEED is not set
# CONFIG_SBNI is not set

#
# Amateur Radio support
#
# CONFIG_HAMRADIO is not set

#
# IrDA (infrared) support
#
# CONFIG_IRDA is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Old CD-ROM drivers (not SCSI, not IDE)
#
# CONFIG_CD_NO_IDESCSI is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
# CONFIG_SERIAL_CONSOLE is not set
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=2048
CONFIG_MOUSE=y

#
# Mice
#
# CONFIG_ATIXL_BUSMOUSE is not set
# CONFIG_BUSMOUSE is not set
# CONFIG_MS_BUSMOUSE is not set
CONFIG_PSMOUSE=y
# CONFIG_82C710_MOUSE is not set
# CONFIG_PC110_PAD is not set

#
# Joysticks
#
# CONFIG_JOYSTICK is not set
# CONFIG_QIC02_TAPE is not set
# CONFIG_WATCHDOG is not set
CONFIG_NVRAM=m
CONFIG_RTC=y
# CONFIG_INTEL_RNG is not set
# CONFIG_AGP is not set
# CONFIG_DRM is not set

#
# Video For Linux
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DTLK is not set

#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set

#
# USB support
#
# CONFIG_USB is not set

#
# Filesystems
#
CONFIG_QUOTA=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
CONFIG_FAT_FS=m
# CONFIG_MSDOS_FS is not set
# CONFIG_UMSDOS_FS is not set
CONFIG_VFAT_FS=m
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
# CONFIG_MINIX_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
CONFIG_DEVPTS_FS=y
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
CONFIG_EXT2_FS=y
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_EFS_FS is not set

#
# Network File Systems
#
# CONFIG_CODA_FS is not set
CONFIG_NFS_FS=m
# CONFIG_NFS_V3 is not set
CONFIG_NFSD=m
# CONFIG_NFSD_V3 is not set
# CONFIG_NFSD_TCP is not set
CONFIG_SUNRPC=m
CONFIG_LOCKD=m
# CONFIG_SMB_FS is not set
# CONFIG_NCP_FS is not set

#
# Partition Types
#
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MAC_PARTITION is not set
# CONFIG_SMD_DISKLABEL is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
CONFIG_NLS=y

#
# Native Language Support
#
CONFIG_NLS_DEFAULT="cp437"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_ISO8859_1 is not set
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set

#
# Console drivers
#
CONFIG_VGA_CONSOLE=y
CONFIG_VIDEO_SELECT=y
# CONFIG_MDA_CONSOLE is not set
# CONFIG_FB is not set

#
# Sound
#
# CONFIG_SOUND is not set

#
# Security options
#
CONFIG_SECURE_STACK=y
CONFIG_SECURE_STACK_SMART=y
CONFIG_SECURE_LINK=y
CONFIG_SECURE_FIFO=y
CONFIG_SECURE_PROC=y
CONFIG_SECURE_FD_0_1_2=y
CONFIG_SECURE_RLIMIT_NPROC=y
# CONFIG_SECURE_SHM is not set

#
# Kernel hacking
#
CONFIG_MAGIC_SYSRQ=y

--


Pegasus
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