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5e3cfe527c
freebsd-skq/sys/geom
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smh 5e3cfe527c Added a sysctl (kern.geom.dev.delete_max_sectors) to control the maximum 
size of a delete request sent to the providing device performed by g_dev_ioctl.

This allows the kernel and apps via ioctl e.g. newfs -E to request large LBA
deletes which siginificantly improves performance.

Previously this was hard coded to 65536 sectors, the new default is 262144
which doubles the throughput of deletes on commonly available SSD's.

In tests on a Intel 520 120GB FW: 400i disk it improved the delete throughput
from 1.6GB/s to over 2.6GB/s on a full disk delete such as that done via
newfs -E

For some SSD's where delete time is pretty much constant, no matter what
the request, setting this to 0 will provide significantly better throughput
e.g. Samsung 840 240GB FW DXT07B0Q @ 262144 = 79G/s, @ 0 = 2259G/s

Reviewed by:	mav
Approved by:	pjd (mentor)
MFC after:	2 weeks
2013-04-26 15:43:24 +00:00
..
bde - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
cache - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
concat Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
eli Always initialize sc_ekey, because as of r238116 it is always used. 2012-08-10 18:43:29 +00:00
gate Remove extra bio_data and bio_length copying to child request after calling 2013-03-26 05:42:12 +00:00
journal Add flags argument to vfs_write_resume() and remove 2013-01-11 06:08:32 +00:00
label Comment typo fix. 2013-04-16 22:42:40 +00:00
linux_lvm Add some FEATURE macros for various GEOM classes. 2011-02-25 10:24:35 +00:00
mirror g_mirror: g_getattr() failure should not be fatal 2013-01-26 10:50:04 +00:00
mountver - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
multipath Make GEOM MULTIPATH to report unmapped bio support if underling path report 2013-03-25 07:24:58 +00:00
nop move the error report to a lower log level... Now you can see when it 2013-04-13 19:02:58 +00:00
part The geom_part provider supports unmapped bio iff the underlying 2013-03-19 14:50:24 +00:00
raid Remove extra bio_data and bio_length copying to child request after calling 2013-03-26 05:42:12 +00:00
raid3 Allow to insert new component to geom_raid3 without specifying number. 2013-01-15 10:06:35 +00:00
sched - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
shsec Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
stripe Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
uncompress Remove unneeded G_PF_CANDELETE flag. 2012-08-28 19:28:31 +00:00
uzip Remove unneeded G_PF_CANDELETE flag. 2012-08-28 19:28:31 +00:00
vinum Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
virstor In virstor_ctl_stop(), check for a valid softc before trying to update 2012-08-03 20:24:16 +00:00
zero Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
geom_aes.c - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
geom_bsd_enc.c
geom_bsd.c Avoid to check the same cache line/variable from all the locking 2012-01-28 14:00:21 +00:00
geom_ccd.c Include sys/sbuf.h directly. 2011-07-11 05:22:31 +00:00
geom_ctl.c Finish r210923, 210926. Mark some devices as eternal. 2011-01-04 10:59:38 +00:00
geom_ctl.h
geom_dev.c Added a sysctl (kern.geom.dev.delete_max_sectors) to control the maximum 2013-04-26 15:43:24 +00:00
geom_disk.c Introduce a symbol for the GEOM class name instead of using the ad-hoc string 2013-04-15 15:55:40 +00:00
geom_disk.h Introduce a symbol for the GEOM class name instead of using the ad-hoc string 2013-04-15 15:55:40 +00:00
geom_dump.c Introduce a symbol for the GEOM class name instead of using the ad-hoc string 2013-04-15 15:55:40 +00:00
geom_event.c Make g_wither_washer() to not loop by itself, but only when there was some 2013-03-24 03:15:20 +00:00
geom_flashmap.c Partial MFP4 of 222836: 2013-04-16 17:47:13 +00:00
geom_fox.c Add some FEATURE macros for various GEOM classes. 2011-02-25 10:24:35 +00:00
geom_int.h Make g_wither_washer() to not loop by itself, but only when there was some 2013-03-24 03:15:20 +00:00
geom_io.c Correct the page count when excess length is trimmed from the bio. 2013-03-21 22:36:43 +00:00
geom_kern.c Move the three geom kprocs as threads under a single pid. 2011-05-11 21:47:30 +00:00
geom_map.c Use %j to match intmax_t. 2012-07-01 05:22:13 +00:00
geom_mbr_enc.c
geom_mbr.c - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
geom_pc98_enc.c
geom_pc98.c Avoid to check the same cache line/variable from all the locking 2012-01-28 14:00:21 +00:00
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 geom_slice.c and its consumers like GEOM_LABEL are not touching the data 2013-03-26 07:55:24 +00:00
geom_slice.h - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
geom_subr.c Make g_wither_washer() to not loop by itself, but only when there was some 2013-03-24 03:15:20 +00:00
geom_sunlabel_enc.c
geom_sunlabel.c Include sys/sbuf.h directly. 2011-07-11 05:22:31 +00:00
geom_vfs.c Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
geom_vfs.h
geom_vol_ffs.c Add some FEATURE macros for various GEOM classes. 2011-02-25 10:24:35 +00:00
geom.h Implement the concept of the unmapped VMIO buffers, i.e. buffers which 2013-03-19 14:13:12 +00:00
notes