dd0b2081f4
file to a stream socket. sendfile(2) is similar to implementations in HP-UX, Linux, and other systems, but the API is more extensive and addresses many of the complaints that the Apache Group and others have had with those other implementations. Thanks to Marc Slemko of the Apache Group for helping me work out the best API for this. Anyway, this has the "net" result of speeding up sends of files over TCP/IP sockets by about 10X (that is to say, uses 1/10th of the CPU cycles) when compared to a traditional read/write loop.
307 lines
8.0 KiB
Plaintext
307 lines
8.0 KiB
Plaintext
# $Id: options,v 1.106 1998/10/28 08:37:10 dfr Exp $
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#
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# On the handling of kernel options
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#
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# All kernel options should be listed in LINT, with suitable
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# descriptions. Negative options (options that make some code not
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# compile) should be commented out; LINT should compile as much code
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# as possible. Try to structure option-using code so that a single
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# option only switch code on, or only switch code off, to make it
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# possible to have a full compile-test. If necessary, you can include
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# "opt_lint.h" and check for COMPILING_LINT to get maximum code
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# coverage.
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#
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# All new options shall also be listed in either "conf/options" or
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# "<machine>/conf/options.<machine>". Options that affect a single
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# source-file <xxx>.[c|s] should be directed into "opt_<xxx>.h", while
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# options that affect multiple files should either go in
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# "opt_global.h" if this is a kernel-wide option (used just about
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# everywhere), or in "opt_<option-name-in-lower-case>.h" if it affect
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# only some files. Note that the effect of listing only an option
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# without a header-file-name in conf/options (and cousins) is that the
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# last convention is followed.
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#
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# This handling scheme is not yet fully implemented.
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#
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#
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# Format of this file:
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# Option name filename
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#
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# If filename is missing, the default is
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# opt_<name-of-option-in-lower-case>.h
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# Adaptec aic7xxx SCSI controller options
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AHC_ALLOW_MEMIO opt_aic7xxx.h # Allow PCI devices to use memory
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# mapped I/O
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AHC_TMODE_ENABLE opt_aic7xxx.h # Bitmap of units to enable
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# targetmode operations.
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ADW_ALLOW_MEMIO opt_adw.h # Allow PCI devices to use memory
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# mapped I/O
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# Miscellaneous options.
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COMPAT_43 opt_compat.h
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COMPAT_SUNOS opt_compat.h
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COMPILING_LINT opt_lint.h
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DDB
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DDB_UNATTENDED opt_ddb.h
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GDB_REMOTE_CHAT opt_ddb.h
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DEVFS
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FAILSAFE
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HW_WDOG
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KTRACE
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MD5
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MFS_ROOT opt_mfs.h
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MFS_ROOT_SIZE opt_mfs.h
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EXPORTMFS opt_mfs.h
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NO_LKM
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NSWAPDEV opt_swap.h
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PPS_SYNC opt_ntp.h
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QUOTA
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SPX_HACK
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SUIDDIR opt_suiddir.h
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SYSVMSG opt_sysvipc.h
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SYSVSEM opt_sysvipc.h
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SYSVSHM opt_sysvipc.h
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UCONSOLE
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# POSIX kernel options
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P1003_1B opt_posix.h
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_KPOSIX_PRIORITY_SCHEDULING opt_posix.h
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_KPOSIX_VERSION opt_posix.h
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# Do we want the config file compiled into the kernel?
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INCLUDE_CONFIG_FILE opt_config.h
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# Options for static file systems. These should only be used at config
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# time, since the corresponding lkms cannot work if there are any static
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# dependencies. Unusability is enforced by hiding the defines for the
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# options in a never-included header.
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EXT2FS opt_dontuse.h
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FDESC opt_dontuse.h
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KERNFS opt_dontuse.h
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MFS opt_dontuse.h
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MSDOSFS opt_dontuse.h
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NULLFS opt_dontuse.h
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PORTAL opt_dontuse.h
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PROCFS opt_dontuse.h
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UMAPFS opt_dontuse.h
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# These static filesystems has one slightly bogus static dependency in
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# sys/i386/i386/autoconf.c. If any of these filesystems are
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# statically compiled into the kernel, code for mounting them as root
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# filesystems will be enabled - but look below. Boot-code is purposely
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# unavailable for the LKM-based versions.
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CODA
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CD9660
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FFS
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NFS
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# If you are following the conditions in the copyright,
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# you can enable soft-updates which will speed up a lot of thigs
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# and make the system safer from crashes at the same time.
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# otherwise a STUB module will be compiled in.
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SOFTUPDATES opt_ffs.h
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# The above static dependencies are planned removed, with a
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# <filesystem>_ROOT option to control if it usable as root. This list
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# allows these options to be present in config files already (though
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# they won't make any difference yet).
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CD9660_ROOT opt_cd9660.h
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FFS_ROOT opt_ffs.h
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NFS_ROOT opt_nfsroot.h
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# Multi-session CD-Rs might require a huge amount of time in order to
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# "settle". If we are about mounting them as the root f/s, we gotta
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# wait a little.
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CD9660_ROOTDELAY opt_cd9660.h
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# The union static file system has bogus static dependencies, so it isn't
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# hidden yet.
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UNION
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# Options used only in param.c.
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MAXUSERS opt_param.h
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MSGMNB opt_param.h
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MSGMNI opt_param.h
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MSGSEG opt_param.h
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MSGSSZ opt_param.h
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MSGTQL opt_param.h
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NBUF opt_param.h
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NMBCLUSTERS opt_param.h
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NSFBUFS opt_param.h
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SEMMAP opt_param.h
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SEMMNI opt_param.h
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SEMMNS opt_param.h
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SEMMNU opt_param.h
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SEMMSL opt_param.h
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SEMOPM opt_param.h
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SEMUME opt_param.h
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SHMALL opt_param.h
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SHMMAX opt_param.h
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SHMMAXPGS opt_param.h
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SHMMIN opt_param.h
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SHMMNI opt_param.h
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SHMSEG opt_param.h
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# Generic SCSI options.
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CAM_MAX_HIGHPOWER opt_cam.h
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CAMDEBUG opt_cam.h
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CAM_DEBUG_BUS opt_cam.h
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CAM_DEBUG_TARGET opt_cam.h
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CAM_DEBUG_LUN opt_cam.h
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CAM_DEBUG_FLAGS opt_cam.h
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SCSI_DELAY opt_scsi.h
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SCSI_REPORT_GEOMETRY opt_scsi.h
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SCSI_NO_SENSE_STRINGS opt_scsi.h
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SCSI_NO_OP_STRINGS opt_scsi.h
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# Options used only in cam/scsi/scsi_cd.c
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CHANGER_MIN_BUSY_SECONDS opt_cd.h
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CHANGER_MAX_BUSY_SECONDS opt_cd.h
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# Options used only in cam/scsi/sa.c.
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SA_SPACE_TIMEOUT opt_sa.h
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SA_REWIND_TIMEOUT opt_sa.h
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SA_ERASE_TIMEOUT opt_sa.h
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# Options used only in pci/ncr.c
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SCSI_NCR_DEBUG opt_ncr.h
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SCSI_NCR_DFLT_TAGS opt_ncr.h
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SCSI_NCR_MAX_SYNC opt_ncr.h
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SCSI_NCR_MAX_WIDE opt_ncr.h
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SCSI_NCR_MYADDR opt_ncr.h
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# Resource limits.
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DFLDSIZ opt_rlimit.h
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MAXDSIZ opt_rlimit.h
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# Net stuff.
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BOOTP opt_bootp.h
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BOOTP_COMPAT opt_bootp.h
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BOOTP_NFSROOT opt_bootp.h
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BOOTP_NFSV3 opt_bootp.h
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BOOTP_WIRED_TO opt_bootp.h
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MROUTING opt_mrouting.h
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INET opt_inet.h
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IPDIVERT
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IPFIREWALL opt_ipfw.h
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IPFIREWALL_VERBOSE opt_ipfw.h
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IPFIREWALL_VERBOSE_LIMIT opt_ipfw.h
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IPFIREWALL_DEFAULT_TO_ACCEPT opt_ipfw.h
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IPFIREWALL_FORWARD opt_ipfw.h
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IPX opt_ipx.h
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IPXIP opt_ipx.h
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IPTUNNEL opt_ipx.h
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NETATALK opt_atalk.h
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PPP_BSDCOMP opt_ppp.h
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PPP_DEFLATE opt_ppp.h
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PPP_FILTER opt_ppp.h
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TCP_COMPAT_42 opt_compat.h
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TCPDEBUG
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IPFILTER opt_ipfilter.h
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IPFILTER_LOG opt_ipfilter.h
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IPFILTER_LKM opt_ipfilter.h
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# ATM (HARP version)
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ATM_CORE opt_atm.h
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ATM_IP opt_atm.h
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ATM_SIGPVC opt_atm.h
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ATM_SPANS opt_atm.h
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ATM_UNI opt_atm.h
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# XXX Conflict: # of devices vs network protocol (Native ATM).
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# This makes "atm.h" unusable.
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NATM opt_natm.h
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DPT_ALLOW_MEMIO opt_dpt.h # Allow PCI devices to use memory
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# mapped I/O
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# DPT driver debug flags
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DPT_VERIFY_HINTR opt_dpt.h
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DPT_USE_SINTR opt_dpt.h
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DPT_RESTRICTED_FREELIST opt_dpt.h
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DPT_MEASURE_PERFORMANCE opt_dpt.h
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DPT_FREELIST_IS_STACK opt_dpt.h
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DPT_HANDLE_TIMEOUTS opt_dpt.h
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DPT_TIMEOUT_FACTOR opt_dpt.h
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DPT_INTR_DELAY opt_dpt.h
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DPT_LOST_IRQ opt_dpt.h
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DPT_SHUTDOWN_SLEEP opt_dpt.h
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DPT_RESET_HBA opt_dpt.h
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# Misc debug flags. Most of these should probably be replaced with
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# 'DEBUG', and then let people recompile just the interesting modules
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# with 'make CC="cc -DDEBUG'.
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CLUSTERDEBUG opt_debug_cluster.h
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DEBUG_1284 opt_debug_1284.h
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LOCKF_DEBUG opt_debug_lockf.h
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LOUTB opt_debug_outb.h
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NPX_DEBUG opt_debug_npx.h
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NETATALKDEBUG opt_atalk.h
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NULLFS_DIAGNOSTIC opt_debug_nullfs.h
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SI_DEBUG opt_debug_si.h
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# These cause changes all over the kernel
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DEBUG opt_global.h
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DIAGNOSTIC opt_global.h
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SIMPLELOCK_DEBUG opt_global.h
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ENABLE_VFS_IOOPT opt_global.h
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# These are VM related options
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VM_KMEM_SIZE opt_vm.h
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VM_KMEM_SIZE_SCALE opt_vm.h
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VM_KMEM_SIZE_MAX opt_vm.h
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NO_SWAPPING opt_vm.h
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PQ_NOOPT opt_vmpage.h
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PQ_NORMALCACHE opt_vmpage.h
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PQ_MEDIUMCACHE opt_vmpage.h
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PQ_LARGECACHE opt_vmpage.h
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PQ_HUGECACHE opt_vmpage.h
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# sys/netkey
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KEY
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KEY_DEBUG opt_key.h
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# Size of the kernel message buffer
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MSGBUF_SIZE opt_msgbuf.h
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# PCI related options
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PCI_QUIET opt_pci.h
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# NFS options
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NFS_MINATTRTIMO opt_nfs.h
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NFS_MAXATTRTIMO opt_nfs.h
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NFS_MINDIRATTRTIMO opt_nfs.h
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NFS_MAXDIRATTRTIMO opt_nfs.h
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NFS_GATHERDELAY opt_nfs.h
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NFS_UIDHASHSIZ opt_nfs.h
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NFS_WDELAYHASHSIZ opt_nfs.h
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NFS_MUIDHASHSIZ opt_nfs.h
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NFS_NOSERVER opt_nfs.h
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NFS_DEBUG opt_nfs.h
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# give bktr an opt_bktr.h file
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OVERRIDE_CARD opt_bktr.h
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OVERRIDE_TUNER opt_bktr.h
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OVERRIDE_DBX opt_bktr.h
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OVERRIDE_MSP opt_bktr.h
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BROOKTREE_SYSTEM_DEFAULT opt_bktr.h
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BKTR_USE_PLL opt_bktr.h
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# meteor opt_meteor.h
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METEOR_ALLOC_PAGES opt_meteor.h
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METEOR_TEST_VIDEO opt_meteor.h
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METEOR_SYSTEM_DEFAULT opt_meteor.h
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METEOR_DEALLOC_PAGES opt_meteor.h
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METEOR_DEALLOC_ABOVE opt_meteor.h
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# Include tweaks for running under the SimOS machine simulator.
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SIMOS opt_simos.h
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# options for bus/device framework
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BUS_DEBUG opt_bus.h
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