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Commit Graph

2496 Commits

Author SHA1 Message Date
Grant Coady
8e8f9289cc [PATCH] I2C: adm9240 driver cleanup
This patch adds an info print of detected VRM stolen from Sebastian
Witt's atxp1 sriver.  ADM9240 already has vrm accessor removed.

Write no-op and whitespace fixes removed :)

Couple of comments changed, tested on 2.6.11.9.

Signed-off-by: Grant Coady <gcoady@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:57 -07:00
Grant Coady
937df8df90 [PATCH] I2C: sysfs names: rename to cpu0_vid, take 3
This small patch changes two drivers, adm1025 and adm1026, to
report vid as cpu0_vid sysfs name as used by the other drivers.

Added duplicated names and six month warning for old names to
be removed as requested.  Compile tested.

Signed-off-by: Grant Coady <gcoady@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:56 -07:00
Grant Coady
abc0192247 [PATCH] I2C: Setting w83627hf fan divisor 128 fails.
Jarkko Lavinen provided patch to fix: "couldn't set the divisor 128
through fan1_div sysfs entry even though the chip supports it and
setting divisors 1..64 worked. This was due to POWER_TO_REG() only
checking 2's powers 0 till 5 but not 6."

This patch applies that fix to w83627hf and w83781d drivers.

Signed-off-by: Grant Coady <gcoady@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:56 -07:00
Grant Coady
b9826b3ee8 [PATCH] I2C: remove <linux/delay.h> from via686a
In my cross-reference checking of sysfs names, the via686a needs
special case treatment as it the only driver expands S_IWUSR to
00200 with gcc -E.  (00200 is the correct value for S_IWUSR).

This is caused by the driver including <linux/delay.h>, it compiles
fine without that header but I am unable to test drive the change.

Signed-off-by: Grant Coady <gcoady@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:56 -07:00
Jean Delvare
815f55f280 [PATCH] I2C: Remove redundancy from i2c-core.c
Call i2c_transfer() from i2c_master_send() and i2c_master_recv() to
avoid the redundant code that was in all three functions.  It also
removes unnecessary debug statements as suggested by Jean Delvare.

This is important for the non-blocking interfaces because they will
have to handle a non-blocking interface in this area.  Having it in
one place greatly simplifies the changes.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:55 -07:00
Kumar Gala
30aedcb339 [PATCH] I2C: Allow for sharing of the interrupt line for i2c-mpc.c
I2C-MPC: Allow for sharing of the interrupt line

On the MPC8548 devices we have multiple I2C-MPC buses however they are on the
same interrupt line.  Made request_irq pass SA_SHIRQ now so the second bus can
register for the same IRQ.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:55 -07:00
Steven Cole
44bbe87e90 [PATCH] Spelling fixes for drivers/i2c.
Here are some spelling corrections for drivers/i2c.

 occured -> occurred
 intialization -> initialization
 Everytime -> Every time
 transfering -> transferring
 relevent -> relevant
 continous -> continuous
 neccessary -> necessary
 explicitely -> explicitly
 Celcius -> Celsius
 differenciate -> differentiate

Signed-off-by: Steven Cole <elenstev@mesatop.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:55 -07:00
Jean Delvare
ec5ce552d9 [PATCH] I2C: Add support for the LPC47M15x and LPC47M192 chips to smsc47m1
This simple patch adds support for the SMSC LPC47M15x and LPC47M192
chips to the smsc47m1 hardware monitoring driver. These chips are
compatible with the other ones already supported by the driver, so I see
no reason not to support them, especially when the Linux 2.4 version of
the driver does already.

I also modified the info printks to name the chips by their real name.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:54 -07:00
Jean Delvare
b9110b1c89 [PATCH] I2C: Fix bugs in the new w83627ehf driver
These are the fixes for the bug you spotted in my new w83627ehf driver:
	- Explicit division by 0.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:54 -07:00
Jean Delvare
08e7e2789e [PATCH] I2C: New hardware monitoring driver: w83627ehf
This is a new hardware monitoring driver, w83627ehf, which supports the
Winbond W83627EHF Super-I/O chip. The driver is not complete, but
already usable. It only implements fan speed and temperature monitoring,
while the chip also supports voltage inputs with VID, PWM output and
temperature sensor selection. I have no more time to work on this, but
anyone with supported hardware could add the missing functionalities
later.

This driver is largely derived from the w83627hf driver.

Thanks to Leon Moonen and Steve Cliffe for tesing the preliminary
versions of my driver and reporting the problems they encountered.

Thanks to Grant Coady for noticing and fixing various corner cases in
the fan management. This third version of the driver hopefully addresses
all the issues the original version had.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:54 -07:00
Grant Coady
40b5cda28a [PATCH] I2C: add new hardware monitor driver: adm9240
Completion of Michiel Rook's port of adm9240 to 2.6 with addition
of auto fan clock divider based on Jean Delvare's algorithm, and
replaces scaling macros with static inlines.

Signed-off-by: Grant Coady <gcoady@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:53 -07:00
Jean Delvare
a551ef79d9 [PATCH] I2C: #include <linux/config.h> cleanup
Hi Alexey,

> Files that don't use CONFIG_* stuff shouldn't include config.h
> Files that use CONFIG_* stuff should include config.h
>
> It's that simple. ;-)

I agree. This won't change anything though, as all drivers include
either device.h or module.h, which in turn include config.h. But you are
still correct, so I approve your patch.

For completeness, I would propose the following on top of your own
patch:

i2c bus drivers do not need to define DEBUG themselves, as the Kconfig
system takes care of it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:53 -07:00
Alexey Dobriyan
f0bb60e7b1 [PATCH] I2C: drivers/i2c/*: #include <linux/config.h> cleanup
Files that don't use CONFIG_* stuff shouldn't include config.h
Files that use CONFIG_* stuff should include config.h

It's that simple. ;-)

Signed-off-by: Alexey Dobriyan <adobriyan@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:53 -07:00
Ladislav Michl
da17838c5e [PATCH] ds1337: export ds1337_do_command
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:52 -07:00
Ladislav Michl
912b9c0c52 [PATCH] ds1337 driver works also with ds1339 chip
On Wed, May 04, 2005 at 12:07:11PM +0200, Jean Delvare wrote:
> Additionally, I would welcome an additional patch documenting the fact
> that the ds1337 driver will work fine with the Dallas DS1339 real-time
> clock chip.

Document the fact that ds1337 driver works also with DS1339 real-time
clock chip.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:52 -07:00
Ladislav Michl
86919833db [PATCH] I2C: ds1337: search by bus number
Chip is searched by bus number rather than its own proprietary id.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:52 -07:00
Ladislav Michl
0058824305 [PATCH] I2C: ds1337: i2c_transfer() checking
i2c_transfer returns number of sucessfully transfered messages. Change
error checking to accordingly. (ds1337_set_datetime never returned
sucess)

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:51 -07:00
Ladislav Michl
0b46e334d7 [PATCH] I2C: ds1337: Make time format consistent with other RTC drivers
Make time format consistent with other RTC drivers.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:51 -07:00
Ladislav Michl
d01b79d061 [PATCH] I2C: ds1337 3/4
dev_{dbg,err} functions should print client's device name. data->id can
be dropped from message, because device is determined by bus it hangs on
(it has fixed address).

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:51 -07:00
Ladislav Michl
6069ffde15 [PATCH] I2C: ds1337 2/4
Use correct macros to convert between bdc and bin. See linux/bcd.h

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:51 -07:00
Ladislav Michl
3e9d0ba130 [PATCH] I2C: ds1337 1/4
Use i2c_transfer to send message, so we get proper bus locking.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:50 -07:00
Greg K-H
69113efac2 [PATCH] I2C: mark all functions static in atxp1 driver
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:50 -07:00
Sebastian Witt
9cb7d18433 [PATCH] I2C: add new atxp1 driver
Adds support for the Attansic ATXP1 I2C device, found on some x86
plattforms to change CPU and other voltages.  Depends on the previous
i2c-vid.h patch.

Signed-off-by: Sebastian Witt <se.witt@gmx.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:50 -07:00
Sebastian Witt
3886246a25 [PATCH] I2C: i2c-vid.h: Support for VID to reg conversion
Adds conversion from VID (mV) to register value. Used by the atxp1 I2C module.
Removed uneeded switch case.

Signed-off-by: Sebastian Witt <se.witt@gmx.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:49 -07:00
Clemens Koller
792f156d61 [PATCH] I2C: rtc8564.c remove duplicate include
[PATCH] I2C rtc8564.c remove duplicate include

Trivial fix: removes duplicate include line.

Signed-off-by: Clemens Koller <clemens.koller@anagramm.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:49 -07:00
Jean Delvare
68cc9d0b71 [PATCH] I2C: Merge unused address lists in some video drivers
On top of my previous patch which removes the use of address ranges in
video i2c drivers, this one can save an additional few bytes of memory.
Most of these drivers which do not use I2C_CLIENT_INSMOD initialize the
unused address lists in a less than optimal way. This patch simply
optimizes this, by using a single one-element list instead of 3
different lists with two elements each.

This saves an average 63 bytes on these drivers.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff -ruN linux-2.6.12-rc1-bk5.orig/drivers/media/video/adv7170.c linux-2.6.12-rc1-bk5/drivers/media/video/adv7170.c
2005-06-21 21:51:49 -07:00
Jean Delvare
b3d5496ea5 [PATCH] I2C: Kill address ranges in non-sensors i2c chip drivers
Some months ago, you killed the address ranges mechanism from all
sensors i2c chip drivers (both the module parameters and the in-code
address lists). I think it was a very good move, as the ranges can
easily be replaced by individual addresses, and this allowed for
significant cleanups in the i2c core (let alone the impressive size
shrink for all these drivers).

Unfortunately you did not do the same for non-sensors i2c chip drivers.
These need the address ranges even less, so we could get rid of the
ranges here as well for another significant i2c core cleanup. Here comes
a patch which does just that. Since the process is exactly the same as
what you did for the other drivers set already, I did not split this one
in parts.

A documentation update is included.

The change saves 308 bytes in the i2c core, and an average 1382 bytes
for chip drivers which use I2C_CLIENT_INSMOD, 126 bytes for those which
do not.

This change is required if we want to merge the sensors and non-sensors
i2c code (and we want to do this).

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Index: gregkh-2.6/Documentation/i2c/writing-clients
===================================================================
2005-06-21 21:51:48 -07:00
Linus Torvalds
2a5a68b840 Merge rsync://oss.sgi.com/git/xfs-2.6 2005-06-21 19:51:18 -07:00
Jesper Juhl
990a8baf56 [PATCH] md: remove unneeded NULL checks before kfree
This patch removes some unneeded checks of pointers being NULL before
calling kfree() on them.  kfree() handles NULL pointers just fine, checking
first is pointless.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21 19:07:48 -07:00
NeilBrown
8a5e9cf1d6 [PATCH] md: make sure md/bitmap doesn't try to write a page with active writeback
Due to the use of write-behind, it is possible for md to write a page to
the bitmap file that is still completing writeback.  This is not allowed.

With this patch, we detect those cases and either force a sync write, or
back off and try later, as appropriate.

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 19:07:47 -07:00
NeilBrown
39730960d9 [PATCH] Two small fixes for md verion-1 superblocks.
1/ Must typecast int to (sector_t) before inverting or we
 might not invert enough bits.

2/ When "bitmap_offset" was added to mdp_superblock_1, we didn't increase
   the count of words-used (96 to 100).

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 19:07:47 -07:00
NeilBrown
7bfa19f274 [PATCH] md: allow md to update multiple superblocks in parallel.
currently, md updates all superblocks (one on each device) in series.  It
waits for one write to complete before starting the next.  This isn't a big
problem as superblock updates don't happen that often.

However it is neater to do it in parallel, and if the drives in the array have
gone to "sleep" after a period of idleness, then waking them is parallel is
faster (and someone else should be worrying about power drain).

Futher, we will need parallel superblock updates for a future patch which
keeps the intent-logging bitmap near the superblock.

Also remove the silly code that retired superblock updates 100 times.  This
simply never made sense.

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 19:07:47 -07:00
NeilBrown
a654b9d8f8 [PATCH] md: allow md intent bitmap to be stored near the superblock.
This provides an alternate to storing the bitmap in a separate file.  The
bitmap can be stored at a given offset from the superblock.  Obviously the
creator of the array must make sure this doesn't intersect with data....
After is good for version-0.90 superblocks.

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 19:07:47 -07:00
NeilBrown
3d310eb7b3 [PATCH] md: fix deadlock due to md thread processing delayed requests.
Before completing a 'write' the md superblock might need to be updated.
This is best done by the md_thread.

The current code schedules this up and queues the write request for later
handling by the md_thread.

However some personalities (Raid5/raid6) will deadlock if the md_thread
tries to submit requests to its own array.

So this patch changes things so the processes submitting the request waits
for the superblock to be written and then submits the request itself.

This fixes a recently-created deadlock in raid5/raid6

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 19:07:46 -07:00
NeilBrown
41158c7eb2 [PATCH] md: optimise reconstruction when re-adding a recently failed drive.
When an array is degraded, bit in the intent-bitmap are never cleared.  So if
a recently failed drive is re-added, we only need to reconstruct the block
that are still reflected in the bitmap.

This patch adds support for this re-adding.

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 19:07:46 -07:00
NeilBrown
289e99e8ed [PATCH] md: initialise sync_blocks in raid1 resync
Otherwise it could have a random value and might BUG.  This fixes a BUG
during resync problem in raid1 introduced by the bitmap-based-intent-loggin
patches.

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 19:07:46 -07:00
NeilBrown
ab7a30c705 [PATCH] md: fix bug when raid1 attempts a partial reconstruct.
The logic here is wrong.  if fullsync is 0, it WILL BUG.

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 19:07:46 -07:00
NeilBrown
191ea9b2c7 [PATCH] md: raid1 support for bitmap intent logging
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 19:07:46 -07:00
NeilBrown
aa3163f816 [PATCH] md: don't skip bitmap pages due to lack of bit that we just cleared.
When looking for pages that need cleaning we skip pages that don't have
BITMAP_PAGE_CLEAN set.  But if it is the 'current' page we will have cleared
that bit ourselves, so skipping it is wrong.  So: move the 'skip this page'
inside 'if page != lastpage'.

Also fold call of file_page_offset into the one place where the value (bit) is
used.

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 19:07:45 -07:00
NeilBrown
77ad4bc706 [PATCH] md: enable the bitmap write-back daemon and wait for it.
Currently we don't wait for updates to the bitmap to be flushed to disk
properly.  The infrastructure all there, but it isn't being used....

A separate kernel thread (bitmap_writeback_daemon) is needed to wait for each
page as we cannot get callbacks when a page write completes.

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 19:07:45 -07:00
NeilBrown
bfb39fba4e [PATCH] md: check return value of write_page, rather than ignore it
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 19:07:45 -07:00
NeilBrown
a2cff26ad1 [PATCH] md: improve debug-printing of bitmap superblock.
- report sync_size properly  - need /2 to convert sectors to KB
- move everything over 2 spaces to allow proper spelling of
  "events cleared".

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 19:07:45 -07:00
akpm@osdl.org
fc7ca163a4 [PATCH] md printk fix
A u64 is not an unsigned long long.  On power4 it is `long', and printk warns.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21 19:07:45 -07:00
NeilBrown
cdbb4cc2e5 [PATCH] md: make sure md bitmap is cleared on a clean start.
As the array-wide clean bit (in the superblock) is set more agressively than
the bits in the bitmap are cleared, it is possible to have an array which is
clean despite there being bits set in the bitmap.

These bits will currently never get cleared, as they can only be cleared by a
resync pass, which never happens.

No, when reading bits from disk, be aware of whether the whole array is known
to be in sync, and act accordingly.

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 19:07:44 -07:00
NeilBrown
bc7f77de2c [PATCH] md: minor code rearrangement in bitmap_init_from_disk
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 19:07:44 -07:00
NeilBrown
d80a138c01 [PATCH] md: print correct pid for newly created bitmap-writeback-daemon.
The debugging message printed the wrong pid, which didn't help remove bugs....

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 19:07:44 -07:00
NeilBrown
5f40402d96 [PATCH] md: call bitmap_daemon_work regularly
bitmap_daemon_work clears bits in the bitmap for blocks that haven't been
written to for a while.  It needs to be called regularly to make sure the
bitmap doesn't endup full of ones ....  but it wasn't.

So call it from the increasingly-inaptly-named md_check_recovery

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 19:07:44 -07:00
NeilBrown
78d742d876 [PATCH] md: a couple of tidyups relating to the bitmap file.
1/ When init from disk, it is a BUG if there is nowhere
   to init from,
2/ use seq_path to print path in /proc/mdstat

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
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
NeilBrown
57afd89f98 [PATCH] md: improve the interface to sync_request
1/ change the return value (which is number-of-sectors synced)
 from 'int' to 'sector_t'.
 The number of sectors is usually easily small enough to fit
 in an int, but if resync needs to abort, it may want to return
 the total number of remaining sectors, which could be large.
 Also errors cannot be returned as negative numbers now, so use
 0 instead
2/ Add a 'skipped' return parameter to allow the array to report
 that it skipped the sectors.  This allows md to take this into account
 in the speed calculations.
 Currently there is no important skipping, but the bitmap-based-resync
 that is coming will use this.

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