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d331c5d43f
freebsd-dev/sys/kern
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Matthew Dillon d331c5d43f Replace the global buffer hash table with per-vnode splay trees using a 
methodology similar to the vm_map_entry splay and the VM splay that Alan
Cox is working on.  Extensive testing has appeared to have shown no
increase in overhead.

Disadvantages
    Dirties more cache lines during lookups.

    Not as fast as a hash table lookup (but still N log N and optimal
    when there is locality of reference).

Advantages
    vnode->v_dirtyblkhd is now perfectly sorted, making fsync/sync/filesystem
    syncer operate more efficiently.

    I get to rip out all the old hacks (some of which were mine) that tried
    to keep the v_dirtyblkhd tailq sorted.

    The per-vnode splay tree should be easier to lock / SMPng pushdown on
    vnodes will be easier.

    This commit along with another that Alan is working on for the VM page
    global hash table will allow me to implement ranged fsync(), optimize
    server-side nfs commit rpcs, and implement partial syncs by the
    filesystem syncer (aka filesystem syncer would detect that someone is
    trying to get the vnode lock, remembers its place, and skip to the
    next vnode).

Note that the buffer cache splay is somewhat more complex then other splays
due to special handling of background bitmap writes (multiple buffers with
the same lblkno in the same vnode), and B_INVAL discontinuities between the
old hash table and the existence of the buffer on the v_cleanblkhd list.

Suggested by: alc
2002-07-10 17:02:32 +00:00
..
bus_if.m Use protected names (_foo) to cutdown on boatloads of lint warnings. 2002-04-21 11:16:10 +00:00
clock_if.m Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
device_if.m
genassym.sh Allow one to specify the AWK used in the environment(commandline). 2002-02-11 03:54:30 +00:00
imgact_aout.c Clean up execve locking: 2002-07-06 07:00:01 +00:00
imgact_elf.c Clean up execve locking: 2002-07-06 07:00:01 +00:00
imgact_gzip.c Modernize my email address. 2002-03-25 13:52:45 +00:00
imgact_shell.c Return a more meaningful errno when the length of the interpreter 2001-11-28 03:26:58 +00:00
inflate.c Modernize my email address. 2002-03-25 13:52:45 +00:00
init_main.c Remove an unused argument in vfs_mountroot(). 2002-07-03 08:52:37 +00:00
init_sysent.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_acct.c More s/file system/filesystem/g 2002-05-16 21:28:32 +00:00
kern_acl.c Fix a bug that prevented the deletion of non-default ACLs from being 2002-06-27 19:31:15 +00:00
kern_clock.c Fixed breakage of binary compatibility of the kern.clockrate sysctl in 2002-05-05 04:33:09 +00:00
kern_condvar.c Fix failure to correctly transition back to sleep mode. 2002-07-02 05:33:46 +00:00
kern_conf.c Break the following implementation of panic(3): 2002-04-25 13:17:33 +00:00
kern_descrip.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
kern_environment.c Cosmetic tweaks. Try and keep the style more consistent, catch some stray 2002-05-01 02:51:50 +00:00
kern_event.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
kern_exec.c Clean up execve locking: 2002-07-06 07:00:01 +00:00
kern_exit.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_fork.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_idle.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_intr.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_jail.c The jail syscall calls chroot, which is not mpsafe, so put back a 2002-07-01 20:46:01 +00:00
kern_kse.c Collect all the (now equivalent) pmap_new_proc/pmap_dispose_proc/ 2002-07-07 23:05:27 +00:00
kern_kthread.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_ktr.c Remove a stale comment. 2002-04-06 08:44:04 +00:00
kern_ktrace.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
kern_linker.c - Delay unlocking a vnode in linker_hints_lookup until we're actually done 2002-07-07 22:35:47 +00:00
kern_lock.c Record the file, line, and pid of the last successful shared lock holder. This 2002-05-30 05:55:22 +00:00
kern_lockf.c More caddr_t removal. 2002-06-29 00:29:12 +00:00
kern_malloc.c - Replace the bandaid introduced in revision 1.110 with 2002-05-31 09:41:09 +00:00
kern_mib.c - Add a mutex to lock the global securelevel value. 2002-04-02 17:43:17 +00:00
kern_module.c - Remove Giant acquisition from modevent(), modfnext(), modstat() and 2002-06-26 00:31:44 +00:00
kern_mtxpool.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_mutex.c Add mtx_ prefixes to the fields used for mutex profiling, and fix a bug 2002-07-03 01:50:27 +00:00
kern_ntptime.c Hide the private parts of timecounter from a couple of places that don't 2002-04-26 21:31:44 +00:00
kern_physio.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
kern_poll.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_proc.c Collect all the (now equivalent) pmap_new_proc/pmap_dispose_proc/ 2002-07-07 23:05:27 +00:00
kern_prot.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
kern_resource.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
kern_sema.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_shutdown.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_sig.c Rearrange the code so that it checks whether the file is something 2002-07-10 06:31:35 +00:00
kern_subr.c Add a hashdestroy() function to undo the actions of hashinit(). 2002-06-30 02:07:26 +00:00
kern_switch.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
kern_sx.c Set the lock type equal to the lock name for now as all of the current 2002-04-04 20:49:35 +00:00
kern_synch.c make this repect ps_sigintr if there is a pre-existing signal 2002-07-06 08:47:24 +00:00
kern_syscalls.c - Lock down the ``module'' structure by adding an SX lock that is used by 2002-03-18 07:45:30 +00:00
kern_sysctl.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
kern_tc.c Time counter stats are unsigned, advertise them to sysctl(8) that way. 2002-06-11 19:47:44 +00:00
kern_thread.c Collect all the (now equivalent) pmap_new_proc/pmap_dispose_proc/ 2002-07-07 23:05:27 +00:00
kern_time.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
kern_timeout.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
kern_uuid.c Fix a minor whitespace style nit that broke 'grep ^uuidgen'. 2002-07-09 19:36:50 +00:00
kern_xxx.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
ksched.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
link_aout.c Simple p_ucred -> td_ucred changes to start using the per-thread ucred 2002-02-27 18:32:23 +00:00
link_elf_obj.c Don't use the symbol name to lookup the symbol value when we can use 2002-04-25 01:22:16 +00:00
link_elf.c Don't use the symbol name to lookup the symbol value when we can use 2002-04-25 01:22:16 +00:00
linker_if.m Add the sysctl "kern.function_list", which currently exports all 2001-10-30 15:21:45 +00:00
Make.tags.inc Don't hardcode /sys when making tags, instead use ${.CURDIR}/.. this 2002-02-27 10:07:15 +00:00
Makefile Don't generate <sys/syscalls-hide.h> it has never had any users anywhere in 2001-10-13 09:17:49 +00:00
makesyscalls.sh Usage style sweep: spell "usage" with a small 'u'. 2002-04-22 13:44:47 +00:00
md4c.c Import kernel part of SMB/CIFS requester. 2001-04-10 07:59:06 +00:00
md5c.c Bring sys/kern/md5c.c in sync with the userland version. 2002-06-24 14:15:25 +00:00
p1003_1b.c Change p_can{debug,see,sched,signal}()'s first argument to be a thread 2002-05-19 00:14:50 +00:00
posix4_mib.c
subr_acl_posix1e.c Fix a bug that prevented the deletion of non-default ACLs from being 2002-06-27 19:31:15 +00:00
subr_autoconf.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_blist.c Now that daddr_t has grown up, use %lld to printf it and cast it to long 2002-05-18 23:46:04 +00:00
subr_bus.c Don't call malloc(9) to allocate zero bytes softc data for devices. 2002-04-23 15:48:23 +00:00
subr_clist.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_clock.c Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
subr_devstat.c GC: BIO_ORDERED, various infrastructure dealing with BIO_ORDERED. 2002-02-22 09:26:35 +00:00
subr_disk.c Implement DIOCGFRONTSTUFF ioctl which reports how many bytes from the start 2002-04-09 15:43:32 +00:00
subr_disklabel.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
subr_diskmbr.c Remove __P. 2002-03-19 21:25:46 +00:00
subr_diskslice.c This commit adds basic support for the UFS2 filesystem. The UFS2 2002-06-21 06:18:05 +00:00
subr_eventhandler.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
subr_hints.c Cosmetic tweaks. Try and keep the style more consistent, catch some stray 2002-05-01 02:51:50 +00:00
subr_kobj.c Convert hit and miss counters to unsigned values. Surely negative values 2002-06-10 22:40:26 +00:00
subr_log.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
subr_mbuf.c m_extadd takes a void (*freef)(void *, void *) now, not a 2002-06-29 00:01:46 +00:00
subr_mchain.c Move the new byte order function prototypes from <sys/param.h> to 2002-04-26 22:48:23 +00:00
subr_module.c Preceed/preceeding are not english words. Use precede and preceding. 2001-02-18 10:43:53 +00:00
subr_param.c Improve the implementation of adjtime(2). 2002-04-15 12:23:11 +00:00
subr_pcpu.c Add a per-cpu variable, cpumask, the preshifted equivalent of 1 << cpuid. 2002-01-05 09:35:50 +00:00
subr_power.c Add generalized power profile code. 2002-03-04 18:46:13 +00:00
subr_prf.c dd %i as an alias for %d for greater compatibility with our *BSD bretheren 2002-07-05 18:36:49 +00:00
subr_prof.c more caddr_t removal. 2002-06-29 02:00:02 +00:00
subr_rman.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
subr_rtc.c Add a generic implementation of inittodr() and resettodr(), as well as 2002-04-04 23:39:10 +00:00
subr_sbuf.c Fix warnings on gcc-3.1+ where __func__ is a const char * instead of a 2002-03-19 10:56:46 +00:00
subr_scanf.c
subr_smp.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
subr_taskqueue.c Change callers of mtx_init() to pass in an appropriate lock type name. In 2002-04-04 21:03:38 +00:00
subr_trap.c Don't slow every syscall and trap by doing locks and stuff if the 2002-07-10 06:40:22 +00:00
subr_turnstile.c Add mtx_ prefixes to the fields used for mutex profiling, and fix a bug 2002-07-03 01:50:27 +00:00
subr_witness.c o Resurrect vm_page_lock_queues(), vm_page_unlock_queues(), and the free 2002-07-04 22:07:37 +00:00
subr_xxx.c Here follows the new kernel dumping infrastructure. 2002-03-31 22:37:00 +00:00
sys_generic.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
sys_pipe.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
sys_process.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
sys_socket.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
syscalls.c Regen. 2002-06-13 23:44:50 +00:00
syscalls.master Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
sysv_ipc.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
sysv_msg.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
sysv_sem.c Remove __P. 2002-03-19 21:25:46 +00:00
sysv_shm.c Remove __P. 2002-03-19 21:25:46 +00:00
tty_compat.c Fixed some style bugs in the removal of __P(()). The main ones were 2002-03-24 05:09:11 +00:00
tty_conf.c KSE Milestone 2 2001-09-12 08:38:13 +00:00
tty_cons.c Change the suser() API to take advantage of td_ucred as well as do a 2002-04-01 21:31:13 +00:00
tty_pty.c - Lock proctree_lock instead of pgrpsess_lock. 2002-04-16 17:09:22 +00:00
tty_subr.c Remove __P. 2002-03-19 21:25:46 +00:00
tty_tty.c Remove __P. 2002-03-19 21:25:46 +00:00
tty.c Part 1 of KSE-III 2002-06-29 17:26:22 +00:00
uipc_accf.c Revert the last bits of my bogus move of NMBCLUSTERS 2001-06-01 21:47:34 +00:00
uipc_cow.c Remove the advertising clause from the Duke BSD copyright on the 2002-07-06 02:44:15 +00:00
uipc_domain.c Back out my lats commit of locking down a socket, it conflicts with hsu's work. 2002-05-31 11:52:35 +00:00
uipc_jumbo.c Remove the advertising clause from the Duke BSD copyright on the 2002-07-06 02:44:15 +00:00
uipc_mbuf2.c In m_aux_delete, no need to chase beyond victim. 2002-05-23 15:59:48 +00:00
uipc_mbuf.c Fix a bug in m_split(): the "m->m_ext.ext_size" field of an mbuf was being 2002-05-31 22:09:57 +00:00
uipc_proto.c Implement a LOCAL_PEERCRED socket option which returns a 2001-08-17 22:01:18 +00:00
uipc_sockbuf.c More caddr_t removal. 2002-06-29 00:29:12 +00:00
uipc_socket2.c More caddr_t removal. 2002-06-29 00:29:12 +00:00
uipc_socket.c More caddr_t removal. 2002-06-29 00:29:12 +00:00
uipc_syscalls.c nuke more instances of caddr_t 2002-06-29 00:02:01 +00:00
uipc_usrreq.c nuke caddr_t. 2002-06-28 23:17:36 +00:00
vfs_acl.c Fix a bug that prevented the deletion of non-default ACLs from being 2002-06-27 19:31:15 +00:00
vfs_aio.c Back out my lats commit of locking down a socket, it conflicts with hsu's work. 2002-05-31 11:52:35 +00:00
vfs_bio.c Replace the global buffer hash table with per-vnode splay trees using a 2002-07-10 17:02:32 +00:00
vfs_cache.c nuke caddr_t. 2002-06-28 23:17:36 +00:00
vfs_cluster.c Replace the global buffer hash table with per-vnode splay trees using a 2002-07-10 17:02:32 +00:00
vfs_default.c Remove vfs_stdmount() and vfs_stdunmount(). They are not 2002-07-09 22:50:29 +00:00
vfs_export.c Partial backout of 1.318, remove error handling added because it may be 2002-06-30 05:23:58 +00:00
vfs_extattr.c Move every code related to mount(2) in a new file, vfs_mount.c. 2002-07-02 17:09:22 +00:00
vfs_init.c We don't need to check the return value of malloc() against 2002-06-22 21:44:11 +00:00
vfs_lookup.c Catch up to changes in ktrace API. 2002-06-07 05:37:18 +00:00
vfs_mount.c - Use standard locking functions in syncer's opv 2002-07-09 19:54:20 +00:00
vfs_subr.c Replace the global buffer hash table with per-vnode splay trees using a 2002-07-10 17:02:32 +00:00
vfs_syscalls.c Move every code related to mount(2) in a new file, vfs_mount.c. 2002-07-02 17:09:22 +00:00
vfs_vnops.c More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t. 2002-06-29 01:50:25 +00:00
vnode_if.src - Use the new vop_lookup_{pre,post} instead of simpler locking specification. 2002-07-09 19:55:06 +00:00