Poul-Henning Kamp f0e185d705 Implement a bio-taskqueue to reduce number of context switches in ...

disk I/O processing.

        The intent is that the disk driver in its hardware interrupt
        routine will simply schedule the bio on the task queue with
        a routine to finish off whatever needs done.

        The g_up thread will then schedule this routine, the likely
        outcome of which is a biodone() which queues the bio on
        g_up's regular queue where it will be picked up and processed.

        Compared to the using the regular taskqueue, this saves one
        contextswitch.

Change our scheduling of the g_up and g_down queues to be water-tight,
at the cost of breaking the userland regression test-shims.

Input and ideas from:   scottl

2003-02-11 22:30:26 +00:00

..

bde

Typo in last commit.

2003-02-11 15:20:34 +00:00

geom_aes.c

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21 08:56:16 +00:00

geom_apple.c

Add a rudimentary class for slicing Apple partitioned disks.

2003-01-31 16:27:07 +00:00

geom_bsd.c

Mark some args unused so this compiles in userland.

2003-01-28 09:48:09 +00:00

geom_ccd.c

Announce our ability to do MAXPHYS transfers.

2003-02-11 21:29:53 +00:00

geom_ctl.c

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21 08:56:16 +00:00

geom_dev.c

Advertise MAXPHYS upwards, we will split as necessary before we get to the

2003-02-11 21:24:25 +00:00

geom_disk.c

Check disk->d_maxsize/dev->si_iosize_max at open time rather than in strategy.

2003-02-11 21:23:34 +00:00

geom_dump.c

Commit the correct copy of the g_stat structure.

2003-02-07 23:08:24 +00:00

geom_enc.c

Add the new statistics structure, put one in consumers and providers.

2003-02-07 21:43:34 +00:00

geom_event.c

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21 08:56:16 +00:00

geom_gpt.c

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21 08:56:16 +00:00

geom_int.h

Move the g_stat struct to its own .h file, we will export it to other code.

2003-02-08 13:03:57 +00:00

geom_io.c

Implement a bio-taskqueue to reduce number of context switches in

2003-02-11 22:30:26 +00:00

geom_kern.c

Implement a bio-taskqueue to reduce number of context switches in

2003-02-11 22:30:26 +00:00

geom_mbr.c

Wrap a long line.

2003-02-11 14:09:48 +00:00

geom_mirror.c

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.

2003-01-21 08:56:16 +00:00

geom_pc98.c

In userland case include <errno.h>, not <err.h>. This is needed to make

2003-01-06 20:05:45 +00:00

geom_slice.c

Don't divide by zero if there is no stripewidth specified.

2003-02-11 15:23:41 +00:00

geom_slice.h

Get rid of g_slice_addslice() and use g_slice_config() instead.

2002-12-16 23:08:48 +00:00

geom_stats.c

Remove a debugging printf.

2003-02-11 10:59:43 +00:00

geom_stats.h

Turn the "updating" flag (back) into two sequence number fields at

2003-02-11 11:01:26 +00:00

geom_subr.c

Move the g_stat struct to its own .h file, we will export it to other code.

2003-02-08 13:03:57 +00:00

geom_sunlabel.c

Move configuration of geom/providers into its own function in preparation

2003-02-01 08:28:43 +00:00

geom_vol_ffs.c

Add some comments about the deficiencies of this module. I had hoped to get

2003-02-07 17:50:33 +00:00

geom.h

Better names for struct disk elements: d_maxsize, d_stripeoffset

2003-02-11 14:57:34 +00:00

notes

Better names for struct disk elements: d_maxsize, d_stripeoffset

2003-02-11 14:57:34 +00:00