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NeilBrown 32a7627cf3 [PATCH] md: optimised resync using Bitmap based intent logging 
With this patch, the intent to write to some block in the array can be logged
to a bitmap file.  Each bit represents some number of sectors and is set
before any update happens, and only cleared when all writes relating to all
sectors are complete.

After an unclean shutdown, information in this bitmap can be used to optimise
resync - only sectors which could be out-of-sync need to be updated.

Also if a drive is removed and then added back into an array, the recovery can
make use of the bitmap to optimise reconstruction.  This is not implemented in
this patch.

Currently the bitmap is stored in a file which must (obviously) be stored on a
separate device.

The patch only provided infrastructure.  It does not update any personalities
to bitmap intent logging.

Md arrays can still be used with no bitmap file.  This patch has minimal
impact on such arrays.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2005-06-21 19:07:43 -07:00
..
acorn Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
acpi [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
atm [ATM]: [drivers] kill pointless NULL checks and casts before kfree() 2005-06-02 13:04:07 -07:00
base [PATCH] node local per-cpu-pages 2005-06-21 18:46:16 -07:00
block [PATCH] Driver Core: drivers/base - drivers/i2c/chips/adm1026.c: update device attribute callbacks 2005-06-20 15:15:32 -07:00
bluetooth Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cdrom [PATCH] ppc64 iSeries: make virtual DVD-RAMs writable again 2005-05-28 11:14:00 -07:00
char [PATCH] mips: add vr41xx gpio support 2005-06-21 18:46:32 -07:00
cpufreq [PATCH] sysfs: (rest) if show/store is missing return -EIO 2005-06-20 15:15:03 -07:00
crypto Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dio [PATCH] Driver Core: drivers/base - drivers/i2c/chips/adm1026.c: update device attribute callbacks 2005-06-20 15:15:32 -07:00
eisa [PATCH] Driver Core: drivers/base - drivers/i2c/chips/adm1026.c: update device attribute callbacks 2005-06-20 15:15:32 -07:00
fc4 fc4/fc: fix warnings and errors related to recent SCSI EH updates 2005-06-19 21:47:56 -04:00
firmware [PATCH] sysfs: (rest) if show/store is missing return -EIO 2005-06-20 15:15:03 -07:00
i2c [PATCH] I2C: drivers/i2c/chips/adm1026.c: use dynamic sysfs callbacks 2005-06-20 15:15:36 -07:00
ide [PATCH] ioc4: CONFIG split 2005-06-21 18:46:32 -07:00
ieee1394 [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks 2005-06-20 15:15:34 -07:00
infiniband [PATCH] sysfs: (rest) if show/store is missing return -EIO 2005-06-20 15:15:03 -07:00
input [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
isdn [PATCH] class: convert drivers/* to use the new class api instead of class_simple 2005-06-20 15:15:09 -07:00
macintosh [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks 2005-06-20 15:15:34 -07:00
mca [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks 2005-06-20 15:15:34 -07:00
md [PATCH] md: optimised resync using Bitmap based intent logging 2005-06-21 19:07:43 -07:00
media [PATCH] class: convert drivers/* to use the new class api instead of class_simple 2005-06-20 15:15:09 -07:00
message [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks 2005-06-20 15:15:34 -07:00
misc [PATCH] ibmasm driver: fix race in command refcount logic 2005-06-21 19:07:35 -07:00
mmc [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks 2005-06-20 15:15:34 -07:00
mtd [PATCH] fix u32 vs. pm_message_t in drivers/mmc,mtd,scsi 2005-04-16 15:25:29 -07:00
net [PATCH] m32r: Remove include/asm-m32r/m32102peri.h 2005-06-21 19:07:31 -07:00
nubus Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
oprofile [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
parisc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
parport [PATCH] ISA_DMA Kconfig fixes - part 2 (parport_pc) 2005-05-04 07:33:13 -07:00
pci [PATCH] PCI: fix show_modalias() function due to attribute change 2005-06-20 15:28:51 -07:00
pcmcia [PATCH] m32r: Update m32r_cfc.[ch] to support Mappi-III platform 2005-06-21 19:07:30 -07:00
pnp [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: update device attribute callbacks 2005-06-20 15:15:34 -07:00
s390 [PATCH] s390: cio max channels checks 2005-06-21 19:07:32 -07:00
sbus [SPARC]: Eliminate local MIN/MAX macros in drivers/sbus/char/aurora.c 2005-05-15 16:01:50 -07:00
scsi [PATCH] megaraid build fix 2005-06-21 18:46:11 -07:00
serial [PATCH] ioc4: PCI bus speed detection 2005-06-21 18:46:32 -07:00
sh [PATCH] Driver Core: drivers/s390/net/qeth_sys.c - drivers/usb/gadget/pxa2xx_udc.c: update device attribute callbacks 2005-06-20 15:15:35 -07:00
sn [PATCH] ioc4: PCI bus speed detection 2005-06-21 18:46:32 -07:00
tc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
telephony [PATCH] ixj* - compile warning cleanup 2005-05-05 16:36:48 -07:00
usb [PATCH] USB: fix show_modalias() function due to attribute change 2005-06-20 15:27:35 -07:00
video [PATCH] fbdev: fill in the access_align field. 2005-06-21 19:07:42 -07:00
w1 [PATCH] Driver Core: drivers/usb/input/aiptek.c - drivers/zorro/zorro-sysfs.c: update device attribute callbacks 2005-06-20 15:15:35 -07:00
zorro [PATCH] Driver Core: drivers/usb/input/aiptek.c - drivers/zorro/zorro-sysfs.c: update device attribute callbacks 2005-06-20 15:15:35 -07:00
Kconfig [PATCH] ioc4: CONFIG split 2005-06-21 18:46:32 -07:00
Makefile [PATCH] ioc4: CONFIG split 2005-06-21 18:46:32 -07:00