Justin T. Gibbs f03f7a0ca3 Correct bioq_disksort so that bioq_insert_tail() offers barrier semantic. ... Add the BIO_ORDERED flag for struct bio and update bio clients to use it. The barrier semantics of bioq_insert_tail() were broken in two ways: o In bioq_disksort(), an added bio could be inserted at the head of the queue, even when a barrier was present, if the sort key for the new entry was less than that of the last queued barrier bio. o The last_offset used to generate the sort key for newly queued bios did not stay at the position of the barrier until either the barrier was de-queued, or a new barrier (which updates last_offset) was queued. When a barrier is in effect, we know that the disk will pass through the barrier position just before the "blocked bios" are released, so using the barrier's offset for last_offset is the optimal choice. sys/geom/sched/subr_disk.c: sys/kern/subr_disk.c: o Update last_offset in bioq_insert_tail(). o Only update last_offset in bioq_remove() if the removed bio is at the head of the queue (typically due to a call via bioq_takefirst()) and no barrier is active. o In bioq_disksort(), if we have a barrier (insert_point is non-NULL), set prev to the barrier and cur to it's next element. Now that last_offset is kept at the barrier position, this change isn't strictly necessary, but since we have to take a decision branch anyway, it does avoid one, no-op, loop iteration in the while loop that immediately follows. o In bioq_disksort(), bypass the normal sort for bios with the BIO_ORDERED attribute and instead insert them into the queue with bioq_insert_tail(). bioq_insert_tail() not only gives the desired command order during insertion, but also provides barrier semantics so that commands disksorted in the future cannot pass the just enqueued transaction. sys/sys/bio.h: Add BIO_ORDERED as bit 4 of the bio_flags field in struct bio. sys/cam/ata/ata_da.c: sys/cam/scsi/scsi_da.c Use an ordered command for SCSI/ATA-NCQ commands issued in response to bios with the BIO_ORDERED flag set. sys/cam/scsi/scsi_da.c Use an ordered tag when issuing a synchronize cache command. Wrap some lines to 80 columns. sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c sys/geom/geom_io.c Mark bios with the BIO_FLUSH command as BIO_ORDERED. Sponsored by: Spectra Logic Corporation MFC after: 1 month		2010-09-02 19:40:28 +00:00
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bde
cache	Fixed cache size decoding read from a label.	2010-07-14 08:22:00 +00:00
concat	Make geom_concat to passthrough stripe parameters of the first component,	2009-12-24 14:32:21 +00:00
eli	Correct offset conversion to little endian. It was implemented in version 2,	2010-08-28 08:30:20 +00:00
gate	'unit' can be negative, so use signed type for it.	2010-06-14 21:58:55 +00:00
journal	Make gjournal work with kernel compiled with "options DIAGNOSTIC".	2009-06-30 14:34:06 +00:00
label	g_label: fix possible NULL pointer dereference	2010-05-31 09:10:39 +00:00
linux_lvm	- Apply the same naming rules of LVM names as done in the LVM code itself.	2009-06-24 22:09:30 +00:00
mirror	Remove bintime_cmp() function, unused since r200086.	2010-08-18 15:38:10 +00:00
mountver	Make sure not to pass NULL to g_orphan_provider().	2010-06-05 08:00:52 +00:00
multipath	Yet another potential dereference of a dead provider.	2010-05-14 21:27:39 +00:00
nop
part	Check that table is not NULL before access, it can be NULL	2010-08-03 09:10:48 +00:00
raid3	Move wakeup() out of mutex to reduce contention.	2010-01-05 10:52:21 +00:00
sched	Correct bioq_disksort so that bioq_insert_tail() offers barrier semantic.	2010-09-02 19:40:28 +00:00
shsec	If provider is open for writing when we taste it, skip it for classes that	2009-10-09 09:42:22 +00:00
stripe	Correct comment.	2010-02-18 22:28:12 +00:00
uzip	Change the way in which zero stripesize is handled. Instead of reporting	2010-01-06 13:14:37 +00:00
vinum	- Don't return EAGAIN from gv_unload(). It was used to work around the	2010-05-10 19:12:23 +00:00
virstor	Prevent NULL deference by checking return value of	2010-02-02 22:25:22 +00:00
zero	In g_zero_destroy_geom(), return 0 instead of EBUSY in the success case.	2010-05-10 19:08:53 +00:00
geom_aes.c
geom_bsd_enc.c
geom_bsd.c
geom_ccd.c
geom_ctl.c
geom_ctl.h
geom_dev.c	fix a few cases where a string is passed via format argument instead of	2010-06-11 19:27:21 +00:00
geom_disk.c	Export PCI IDs of ATA/SATA controllers through CAM and ata(4) layers to	2010-07-25 15:43:52 +00:00
geom_disk.h	Export PCI IDs of ATA/SATA controllers through CAM and ata(4) layers to	2010-07-25 15:43:52 +00:00
geom_dump.c	Escape characters unsafe for XML output in GEOM class, instance and	2010-03-20 16:16:13 +00:00
geom_event.c	Try and narrow the gap in which you act on an event that has been canceled.	2010-06-08 22:40:02 +00:00
geom_fox.c
geom_int.h
geom_io.c	Correct bioq_disksort so that bioq_insert_tail() offers barrier semantic.	2010-09-02 19:40:28 +00:00
geom_kern.c
geom_mbr_enc.c
geom_mbr.c
geom_pc98_enc.c
geom_pc98.c
geom_redboot.c	- Give geom_redboot taste of flash/spi. Now there is another provider	2010-02-03 01:12:19 +00:00
geom_slice.c	Change the way in which zero stripesize is handled. Instead of reporting	2010-01-06 13:14:37 +00:00
geom_slice.h
geom_subr.c	Fix deadlock between GEOM class unloading and withering. Withering can't	2010-05-05 18:53:24 +00:00
geom_sunlabel_enc.c
geom_sunlabel.c
geom_vfs.c	g_vfs_open: allow only one mount per device vnode	2010-04-03 08:53:53 +00:00
geom_vfs.h
geom_vol_ffs.c
geom.h	Fix deadlock between GEOM class unloading and withering. Withering can't	2010-05-05 18:53:24 +00:00
notes