Scott Long ab8f55b9fd Add a sysctl vfs.read_min to complement the exiting vfs.read_max. It ...

defaults to 1, meaning that it's off.

When read-ahead is enabled on a file, the vfs cluster code deliberately
breaks a read into 2 I/O transactions; one to satisfy the actual read,
and one to perform read-ahead.  This makes sense in low-latency
circumstances, but often produces unbalanced i/o transactions that
penalize disks.  By setting vfs.read_min, we can tell the algorithm to
fetch a larger transaction that what we asked for, achieving the same
effect as the read-ahead but without the doubled, unbalanced transaction
and the slightly lower latency.  This significantly helps our workloads
with video streaming.

Submitted by:	emax
Reviewed by:	kib
Obtained from:	Netflix

2013-05-07 08:16:21 +00:00

..

bus_if.m

Add a BUS_CHILD_DELETED() method that a bus can hook to allow it to cleanup

2012-08-21 18:13:09 +00:00

capabilities.conf

Add pipe2() system call.

2013-05-01 22:42:42 +00:00

clock_if.m

…

cpufreq_if.m

…

device_if.m

Revert r239178 and implement two new functions, namely

2012-08-15 15:42:57 +00:00

dtio_kdtrace.c

Change the module name for the I/O provider to "kernel" from

2012-09-25 19:16:28 +00:00

genassym.sh

…

imgact_aout.c

Cosmetics: define FREEBSD32_MINUSER and AOUT32_MINUSER for struct

2012-07-22 13:41:45 +00:00

imgact_elf32.c

…

imgact_elf64.c

…

imgact_elf.c

Introduce a constant, ELF_NOTE_ROUNDSIZE, which evidently declare our

2013-05-01 14:59:16 +00:00

imgact_gzip.c

- Correct mispellings of the word necessary

2013-04-17 11:42:40 +00:00

imgact_shell.c

The execution of the shebang script requires putting interpreter path,

2011-03-06 22:59:30 +00:00

inflate.c

…

init_main.c

MFP4 change 210763

2013-04-03 22:24:36 +00:00

init_sysent.c

Regenerate files for pipe2().

2013-05-01 22:45:04 +00:00

kern_acct.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_alq.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_clock.c

Add a generic way to call per event allocate / release function.

2013-03-05 10:18:48 +00:00

kern_clocksource.c

- Make callout(9) tickless, relying on eventtimers(4) as backend for

2013-03-04 11:09:56 +00:00

kern_condvar.c

MFcalloutng:

2013-03-04 12:20:48 +00:00

kern_conf.c

Reject spaces and double quotation marks in device names. devctl(4)

2012-12-22 13:33:28 +00:00

kern_cons.c

cngetc: use cpu_spinwait to ease the cncheckc loop a tiny bit

2012-10-06 19:50:23 +00:00

kern_context.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

kern_cpu.c

Revert r175376 and tune cpufreq(4) frequency comparison logic instead.

2012-03-10 18:56:16 +00:00

kern_cpuset.c

Post r222812 KTR_CPUMASK started being initialized only as a tunable

2012-08-30 21:22:47 +00:00

kern_ctf.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_descrip.c

Similar to 233760 and 236717, export some more useful info about the

2013-05-03 21:11:57 +00:00

kern_dtrace.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

kern_environment.c

r249408 and r249436 cause a NULL pointer dereference on the CUBIEBOARD

2013-04-16 22:09:08 +00:00

kern_et.c

Fix incorrect assertion that caused panic when periodic-only timers used.

2013-03-13 06:42:01 +00:00

kern_event.c

Rework overflow checks of r247898 to not let too "intelligent" compiler to

2013-03-09 09:07:13 +00:00

kern_exec.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_exit.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

kern_fail.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

kern_ffclock.c

Revise the sysctl handling code and restructure the hierarchy of sysctls

2011-12-01 07:19:13 +00:00

kern_fork.c

Include PID in the error message which is printed when the maxproc limit

2013-04-19 15:19:29 +00:00

kern_gzio.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_hhook.c

Staticize malloc types.

2011-04-13 11:28:46 +00:00

kern_idle.c

On multi-core, multi-threaded PPC systems, it is important that the threads

2011-05-31 15:11:43 +00:00

kern_intr.c

If filter of the interrupt event is not null, print it, in addition to

2013-04-05 14:30:51 +00:00

kern_jail.c

prison_racct_detach can be called for not fully initialized jail, so make it check that the jail has racct before doing anything

2012-12-18 18:34:36 +00:00

kern_khelp.c

Use the full and proper company name for Swinburne University of Technology

2011-04-12 08:13:18 +00:00

kern_kthread.c

Stop treating td_sigmask specially for the purposes of new thread

2012-05-26 20:03:47 +00:00

kern_ktr.c

ktr: correctly handle possible wrap-around in the boot buffer

2013-02-08 07:29:07 +00:00

kern_ktrace.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_linker.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

kern_lock.c

lockmgr: unlock interlock (if requested) when dealing with upgrade/downgrade

2013-01-06 21:47:59 +00:00

kern_lockf.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

kern_lockstat.c

…

kern_loginclass.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

kern_malloc.c

Try to improve r242655 take III: move these SYSCTLs describing the kernel

2013-02-04 09:35:48 +00:00

kern_mbuf.c

Base the calculation of maxmbufmem in part on kmem_map size

2013-04-24 13:54:55 +00:00

kern_mib.c

fix some fat-fingering in r246246

2013-02-02 14:19:50 +00:00

kern_module.c

Fix a typo.

2012-08-22 20:01:57 +00:00

kern_mtxpool.c

…

kern_mutex.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_ntptime.c

Limit popcorn limit to something sane (either 2ns or 2 ticks if that's

2012-08-16 02:35:44 +00:00

kern_osd.c

…

kern_physio.c

Add dev_strategy_csw() function, which is similar to dev_strategy()

2013-03-27 11:34:27 +00:00

kern_pmc.c

Add software PMC support.

2012-03-28 20:58:30 +00:00

kern_poll.c

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

2011-11-07 15:43:11 +00:00

kern_priv.c

- Add sysctl to allow unprivileged users to call mlock(2)-family system

2012-12-18 07:36:45 +00:00

kern_proc.c

Similarly to proc_getargv() and proc_getenvv(), export proc_getauxv()

2013-04-14 20:03:48 +00:00

kern_prot.c

Style fix

2012-11-14 10:33:12 +00:00

kern_racct.c

Accessing td_state requires thread lock to be held.

2013-03-14 23:20:18 +00:00

kern_rangelock.c

Add a rangelock implementation, intended to be used to range-locking

2012-05-30 16:06:38 +00:00

kern_rctl.c

Add CPU percentage limit enforcement to RCTL. The resouce name is "pcpu".

2012-10-26 16:01:08 +00:00

kern_resource.c

Call sched_prio() to immediately change the priority of the thread in

2013-03-07 02:53:29 +00:00

kern_rmlock.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_rwlock.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_sdt.c

Instead of only iterating over the set of known SDT probes when sdt.ko is

2012-03-27 15:07:43 +00:00

kern_sema.c

…

kern_sharedpage.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_shutdown.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

kern_sig.c

Fix memory leak in coredump().

2013-04-05 20:24:51 +00:00

kern_switch.c

Add a comment on why inlining critical_enter() may not be a good idea

2012-12-09 04:54:22 +00:00

kern_sx.c

Fixup r240424: On entering KDB backends, the hijacked thread to run

2012-12-22 09:37:34 +00:00

kern_synch.c

Partially revert r195702. Deferring stops is now implemented via a set of

2013-03-18 17:23:58 +00:00

kern_syscalls.c

…

kern_sysctl.c

- Use strdup(9) instead of reimplementing it.

2013-03-01 18:49:14 +00:00

kern_tc.c

- Make callout(9) tickless, relying on eventtimers(4) as backend for

2013-03-04 11:09:56 +00:00

kern_thr.c

Stop treating td_sigmask specially for the purposes of new thread

2012-05-26 20:03:47 +00:00

kern_thread.c

Another NFS SIGSTOP related fix: Ignore thread suspend requests due to

2013-03-21 14:06:27 +00:00

kern_time.c

Make kern_nanosleep() and pause_sbt() to use per-CPU sleep queues.

2013-03-12 06:58:49 +00:00

kern_timeout.c

Cache the callout precision argument as part of the informations required

2013-03-25 09:43:50 +00:00

kern_umtx.c

sem: Restart the POSIX sem_* calls after signals with SA_RESTART set.

2013-04-19 10:16:00 +00:00

kern_uuid.c

Convert all users of IF_ADDR_LOCK to use new locking macros that specify

2012-01-05 19:00:36 +00:00

kern_xxx.c

…

ksched.c

sched_rr_interval() seems always returned period in hz ticks, but same

2012-08-10 18:19:57 +00:00

link_elf_obj.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

link_elf.c

Remove the support for using non-mpsafe filesystem modules.

2012-10-22 17:50:54 +00:00

linker_if.m

…

Make.tags.inc

Disconnect non-MPSAFE SMBFS from the build in preparation for dropping

2012-10-18 12:04:56 +00:00

Makefile

Continue to introduce Capsicum Capability Mode support:

2011-03-01 13:28:27 +00:00

makesyscalls.sh

- Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate()

2011-11-21 01:26:10 +00:00

md4c.c

…

md5c.c

…

p1003_1b.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

posix4_mib.c

Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which

2011-07-17 23:05:24 +00:00

sched_4bsd.c

Add CPU percentage limit enforcement to RCTL. The resouce name is "pcpu".

2012-10-26 16:01:08 +00:00

sched_ule.c

Point args[0] not at the thread that is ending but at the one that

2013-04-15 17:21:02 +00:00

serdev_if.m

…

stack_protector.c

…

subr_acl_nfs4.c

Fix bug where NFSv4 ACL enforcement code wouldn't unconditionally

2012-04-17 14:54:00 +00:00

subr_acl_posix1e.c

Add module load/unload stubs.

2012-03-13 20:27:48 +00:00

subr_autoconf.c

Retire PCONFIG and leave the priority of thread0 alone when waiting for

2011-01-06 22:09:37 +00:00

subr_blist.c

Remove reference to the rlist code from comments, and fix a typo visible

2013-02-05 20:08:33 +00:00

subr_bufring.c

…

subr_bus_dma.c

Some compilers issue a warning when wider integer is casted to narrow

2013-04-16 07:11:52 +00:00

subr_bus.c

Fix a typo.

2013-01-23 14:37:05 +00:00

subr_busdma_bufalloc.c

Create an architecture-agnostic buffer pool manager that uses uma(9) to

2012-12-20 00:34:54 +00:00

subr_clock.c

Improve style and wording of comments and sysctl descriptions [1].

2011-01-09 14:34:56 +00:00

subr_counter.c

On non-ACPI i386 mp_ncpus is initialized at SI_SUB_CPU, and this

2013-04-17 18:43:33 +00:00

subr_devstat.c

Fix build for kernels with dtrace hooks.

2012-07-11 18:50:50 +00:00

subr_disk.c

…

subr_dummy_vdso_tc.c

Implement mechanism to export some kernel timekeeping data to

2012-06-22 07:06:40 +00:00

subr_eventhandler.c

…

subr_fattime.c

…

subr_firmware.c

Correct sizeof usage

2012-06-25 05:41:16 +00:00

subr_hash.c

Convert panic()s to KASSERT()s. This is an optimisation for

2012-01-23 16:31:46 +00:00

subr_hints.c

Style fixes.

2012-09-04 23:16:55 +00:00

subr_kdb.c

- Extend the KDB interface to add a per-debugger callback to print a

2012-04-12 17:43:59 +00:00

subr_kobj.c

As it turns out, r186347 actually is insufficient to avoid the use of the

2011-11-15 20:11:03 +00:00

subr_lock.c

- Implement run-time expansion of the KTR buffer via sysctl.

2012-11-15 00:51:57 +00:00

subr_log.c

MFcalloutng (r244255 by mav, with minor changes):

2013-03-04 16:07:55 +00:00

subr_mbpool.c

…

subr_mchain.c

Mechanically substitute flags from historic mbuf allocator with

2012-12-05 08:04:20 +00:00

subr_module.c

Provide convenience function for obtaining MODINFO_ADDR and MODINFO_SIZE

2011-02-09 19:08:21 +00:00

subr_msgbuf.c

- Clean up timestamps in msgbuf code. The timestamps should now be

2012-03-19 00:36:32 +00:00

subr_param.c

Implement the concept of the unmapped VMIO buffers, i.e. buffers which

2013-03-19 14:13:12 +00:00

subr_pcpu.c

Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

2011-11-07 06:44:47 +00:00

subr_power.c

…

subr_prf.c

Fix double vision syndrome (read: double output) when in the

2011-10-16 14:16:46 +00:00

subr_prof.c

Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs.

2011-11-07 15:43:11 +00:00

subr_rman.c

Unlock in the error path to prevent a lock leak.

2012-05-31 17:27:05 +00:00

subr_rtc.c

Core structure and functions to support a feed-forward clock within the kernel.

2011-11-19 14:10:16 +00:00

subr_sbuf.c

Add sbuf_start_section() and sbuf_end_section() functions, which can

2013-04-11 19:49:18 +00:00

subr_scanf.c

Xen netback driver rewrite.

2012-01-26 16:35:09 +00:00

subr_sglist.c

…

subr_sleepqueue.c

Partially revert r195702. Deferring stops is now implemented via a set of

2013-03-18 17:23:58 +00:00

subr_smp.c

- Correctly handle EWOULDBLOCK in quiesce_cpus

2012-12-19 20:08:06 +00:00

subr_stack.c

Constify stack argument for functions that don't modify it.

2011-11-16 19:06:55 +00:00

subr_syscall.c

Fix build on ARM (and probably other platforms)

2012-12-28 06:52:53 +00:00

subr_taskqueue.c

Extend taskqueue(9) to enable per-taskqueue callbacks.

2013-03-23 15:11:53 +00:00

subr_trap.c

Partially revert r195702. Deferring stops is now implemented via a set of

2013-03-18 17:23:58 +00:00

subr_turnstile.c

Update the comment: we do show the backtrace of misbehaving thread.

2013-02-17 21:37:32 +00:00

subr_uio.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

subr_unit.c

Correct double "the the"

2012-09-14 21:28:56 +00:00

subr_witness.c

Correct the lock class for the vm object lock.

2013-03-09 10:16:08 +00:00

sys_capability.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

sys_generic.c

Rework overflow checks of r247898 to not let too "intelligent" compiler to

2013-03-09 09:07:13 +00:00

sys_pipe.c

Add pipe2() system call.

2013-05-01 22:42:42 +00:00

sys_procdesc.c

Add the wait6(2) system call. It takes POSIX waitid()-like process

2012-11-13 12:52:31 +00:00

sys_process.c

Switch some "low-hanging fruit" to acquire read lock on vmobjects

2013-04-08 19:58:32 +00:00

sys_socket.c

Add the fo_chown and fo_chmod methods to struct fileops and use them

2011-08-16 20:07:47 +00:00

syscalls.c

Regenerate files for pipe2().

2013-05-01 22:45:04 +00:00

syscalls.master

Add pipe2() system call.

2013-05-01 22:42:42 +00:00

systrace_args.c

Regenerate files for pipe2().

2013-05-01 22:45:04 +00:00

sysv_ipc.c

…

sysv_msg.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

sysv_sem.c

In order to maximize the re-usability of kernel code in user space this

2011-09-16 13:58:51 +00:00

sysv_shm.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

tty_compat.c

…

tty_info.c

Fix whitespace inconsistencies in TTY code.

2012-02-06 18:15:46 +00:00

tty_inq.c

Use strchr() and strrchr().

2012-01-02 12:12:10 +00:00

tty_outq.c

Fix whitespace inconsistencies in the TTY layer and its drivers owned by me.

2011-06-26 18:26:20 +00:00

tty_pts.c

Allow O_CLOEXEC in posix_openpt() flags.

2013-03-21 21:39:15 +00:00

tty_tty.c

Finish r210923, 210926. Mark some devices as eternal.

2011-01-04 10:59:38 +00:00

tty_ttydisc.c

Correct SIGTTIN handling.

2012-10-25 09:05:21 +00:00

tty.c

Merge Capsicum overhaul:

2013-03-02 00:53:12 +00:00

uipc_accf.c

…

uipc_cow.c

Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/

2011-02-25 10:11:01 +00:00

uipc_debug.c

…

uipc_domain.c

- Implement two new system calls:

2013-03-02 21:11:30 +00:00

uipc_mbuf2.c

Mechanically substitute flags from historic mbuf allocator with

2012-12-05 08:04:20 +00:00

uipc_mbuf.c

Fix bug in m_split() in a case when split len matches len of the

2013-03-29 14:10:40 +00:00

uipc_mqueue.c

mqueue,ksem,shm: Fix race condition with setting UF_EXCLOSE.

2013-04-07 15:26:09 +00:00

uipc_sem.c

Similar to 233760 and 236717, export some more useful info about the

2013-05-03 21:11:57 +00:00

uipc_shm.c

mqueue,ksem,shm: Fix race condition with setting UF_EXCLOSE.

2013-04-07 15:26:09 +00:00

uipc_sockbuf.c

Once ng_ksocket(4) is fixed, re-apply r194662. See this revision for

2013-03-29 14:06:04 +00:00

uipc_socket.c

Back out r249318, r249320 and r249327 due to a heisenbug most

2013-05-06 16:42:18 +00:00

uipc_syscalls.c

Add accept4() system call.

2013-05-01 20:10:21 +00:00

uipc_usrreq.c

Add fdallocn function and use it when passing fds over unix socket.

2013-04-14 17:08:34 +00:00

vfs_acl.c

Prezero the acl structure which is to be copied to usermode, to avoid

2013-02-06 15:18:46 +00:00

vfs_aio.c

Fix a race with the vnode reclamation in the aio_qphysio(). Obtain

2013-03-27 11:47:52 +00:00

vfs_bio.c

Add dev_strategy_csw() function, which is similar to dev_strategy()

2013-03-27 11:34:27 +00:00

vfs_cache.c

When renaming a directory from one parent directory to another,

2013-03-20 17:57:00 +00:00

vfs_cluster.c

Add a sysctl vfs.read_min to complement the exiting vfs.read_max. It

2013-05-07 08:16:21 +00:00

vfs_default.c

Switch the vm_object mutex to be a rwlock. This will enable in the

2013-03-09 02:32:23 +00:00

vfs_export.c

Further refine the handling of stop signals in the NFS client. The

2013-02-21 19:02:50 +00:00

vfs_extattr.c

Use a shared lock for VOP_GETEXTATTR, as it is a read-like operation.

2013-03-30 15:09:04 +00:00

vfs_hash.c

Add exported vfs_hash_index() function, which calculates the canonical

2013-01-14 05:41:40 +00:00

vfs_init.c

Don't worry if a module is already loaded when looking for a fstype to mount

2013-02-21 02:41:37 +00:00

vfs_lookup.c

Do not call the VOP_LOOKUP() for the doomed directory vnode. The

2013-04-01 09:59:38 +00:00

vfs_mount.c

- Correct mispellings of the word occurrence

2013-04-17 11:40:10 +00:00

vfs_mountroot.c

post mountroot event after a real/final root is mounted

2013-03-23 08:59:34 +00:00

vfs_subr.c

Add missing vdrop() in error case.

2013-05-04 18:38:16 +00:00

vfs_syscalls.c

- Constify local path variable for chflagsat().

2013-03-22 07:40:34 +00:00

vfs_vnops.c

Fix FIONREAD on regular files. The computed result was being ignored and

2013-05-03 19:08:58 +00:00

vnode_if.src

remove vop_lookup_pre and vop_lookup_post

2012-11-22 10:36:10 +00:00