0a34594b9c
r256603: Introduce new function devstat_end_transaction_bio_bt(), adding new argument to specify present time. Use this function to move binuptime() out of lock, substantially reducing lock congestion when slow timecounter is used. r256606: Move g_io_deliver() out of the lock, as required for direct dispatch. Move g_destroy_bio() out too to reduce lock scope even more. r256607: Fix passing uninitialized bio_resid argument to g_trace(). r256610: Add unmapped I/O support to GEOM RAID. r256830: Restore BIO_UNMAPPED and BIO_TRANSIENT_MAPPING in biodonne() when unmapping temporary mapped buffer. That fixes double unmap if biodone() called twice for the same BIO (but with different done methods). r256880: Merge GEOM direct dispatch changes from the projects/camlock branch. When safety requirements are met, it allows to avoid passing I/O requests to GEOM g_up/g_down thread, executing them directly in the caller context. That allows to avoid CPU bottlenecks in g_up/g_down threads, plus avoid several context switches per I/O. r259247: Fix bug introduced at r256607. We have to recalculate bp_resid here since sizes of original and completed requests may differ due to end of media. Testing of the stable/10 merge was done by Netflix, but all of the credit goes to Alexander and iX Systems. Submitted by: mav Sponsored by: iX Systems
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*-
|
|
* Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _G_NOP_H_
|
|
#define _G_NOP_H_
|
|
|
|
#define G_NOP_CLASS_NAME "NOP"
|
|
#define G_NOP_VERSION 4
|
|
#define G_NOP_SUFFIX ".nop"
|
|
|
|
#ifdef _KERNEL
|
|
#define G_NOP_DEBUG(lvl, ...) do { \
|
|
if (g_nop_debug >= (lvl)) { \
|
|
printf("GEOM_NOP"); \
|
|
if (g_nop_debug > 0) \
|
|
printf("[%u]", lvl); \
|
|
printf(": "); \
|
|
printf(__VA_ARGS__); \
|
|
printf("\n"); \
|
|
} \
|
|
} while (0)
|
|
#define G_NOP_LOGREQ(bp, ...) G_NOP_LOGREQLVL(2, bp, __VA_ARGS__)
|
|
#define G_NOP_LOGREQLVL(lvl, bp, ...) do { \
|
|
if (g_nop_debug >= (lvl)) { \
|
|
printf("GEOM_NOP[%d]: ", (lvl)); \
|
|
printf(__VA_ARGS__); \
|
|
printf(" "); \
|
|
g_print_bio(bp); \
|
|
printf("\n"); \
|
|
} \
|
|
} while (0)
|
|
|
|
struct g_nop_softc {
|
|
int sc_error;
|
|
off_t sc_offset;
|
|
off_t sc_explicitsize;
|
|
u_int sc_rfailprob;
|
|
u_int sc_wfailprob;
|
|
uintmax_t sc_reads;
|
|
uintmax_t sc_writes;
|
|
uintmax_t sc_readbytes;
|
|
uintmax_t sc_wrotebytes;
|
|
struct mtx sc_lock;
|
|
};
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _G_NOP_H_ */
|