region above 3GB
preventing RAM from being mapped there, and doesn't support remapping
the covered RAM to above 4GB. Nothing the kernel can do about it.
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this problem in Linux on the X86 plateform???
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of the drive and controller just not getting along,
but you might want to try a different SATA cable as well.
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,
Steve
That patch on its own will not help, you also need Tejun's
stop-on-shutdown patch, otherwise the kernel will not try to stop the
disk before powering off.
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) is much greater than the number of people
running a SAN, multi-initiator, etc. environment where you might not
want this..
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Some drives seem to spin up at step #3 even when its cache is clean and
power goes off right after the disk finishes the command. So, it's
really bad when it happens - spin down, spin up followed by immediate
power off.
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amount of SATA fixes backported from 2.6.21...
News to me.. pleast post details.
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check to
require it to be so reserved, then.
Really, I think we should be basing this check on whether the
corresponding memory range is reserved in the ACPI resources, like
Windows expects. This does require putting more fingers into ACPI from
this early boot stage, though..
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and thus
covered under the GPL).
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More
of that header. The userspace version of
that header has everything inside #ifdef __KERNEL__ stripped out.
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without ACPI anymore, so going without ACPI can be
problematic.
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] _spin_lock_irqsave+0x9/0xd
[c041febf] __wake_up+0x18/0x43
[c04379ce] __wake_up_bit+0x2e/0x33
[c045a496] shrink_inactive_list+0x483/0x6c9
RAM issues are a possibility for this sort of problem, tried running
Memtest86+?
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like the aha1542 driver doesn't set the DMA mask, so the kernel
will default to thinking it can do 32-bit DMA when it should be 24-bit.
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the mutex even though it has not.
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More
this buffer from the userspace
application, rather than trying to achieve this in the driver..
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for something that already occurred.
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-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.21-rc3-git3/drivers/ata/sata_nv.c 2007-03-08 17:15:25.0
-0600
+++ linux-2.6.21-rc3-git3edit/drivers/ata/sata_nv.c 2007-03-08
17:19:42.0 -0600
@@ -874,8 +874,14 @@
if (status (NV_ADMA_STAT_DONE
Jeff Garzik wrote:
[EMAIL PROTECTED] wrote:
From: Robert Hancock [EMAIL PROTECTED]
Reading from the ATA shadow registers while we are in ADMA mode may cause
undefined behavior. Don't read the ATA status register when completing
commands for this reason, it shouldn't be needed
should be able to.
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think it does have it now too..
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sources and documentation
but still dont have broad picture.
I believe you should be able to do this by sending ATA pass-through SCSI
commands into the device using SG_IO, without any kernel changes. It's
really the mechanism that's meant for this..
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, I know it used its own
NULL, which may be defined as ((void*)0), but it's _still_ different
from raw zero. So can I say using NULL is better than 0 in kernel?
It's the preferred style, Sparse will complain about using 0 for a null
pointer for example..
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?
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. Perfect may be the
enemy of the good, but works except no power management is hardly what
I would call good these days, more like pretty sloppy..
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on unknown-block(0,0)
and its dead
Take the quiet option off the kernel command line (in /etc/grub.conf)
so you can actually see all the messages that are being output.
Presumably you haven't selected something that you need in order to
mount the root filesystem..
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) but this is not a proper implementation.
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is allowed to support, but it
is not required to.) A single drive should always be set to master (and
connected to the end of the cable and not the middle, by the way).
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often due to driver issues.
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Patrick Ale wrote:
On 2/11/07, Robert Hancock [EMAIL PROTECTED] wrote:
Patrick Ale wrote:
Something unrelated to the tests I am doing.
I found out that the libsata driver doesn't really cope or likes the
idea that you might have a controller without a master drive
configured
info for messages in recent kernels..
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More
than -mm right now - applying the
2.6.20-git6 patch on top of 2.6.20 should do it.
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and then the user would know they have to remove that
module, etc. before suspending (there is at least some distro script
support for doing that automatically based on a config file), since it
hasn't a hope of working after resume until the framework is updated to
support suspending.
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and never disabled.
Not sure what the best way to fix this is?
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ADMA-capable controllers provide a bit in the status register that appears
to indicate that the controller detected an SError condition. Update sata_nv
to detect this and trigger error handling in order to handle the fault.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- drivers/ata
it won't spew at inappropriate times like suspend/resume.
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--- linux-2.6.20-git6/drivers/ata/sata_nv.c 2007-02-11 17:31:19.0
-0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-11 17:40:48.0
-0600
@@ -1442,6 +1442,26
HTS541010G9SA00 MBZOC60D
(the latter 3 being Hitachi Travelstar drives)
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Robert Hancock wrote:
Given the above, what I'm proposing to do is:
-Remove the blacklisting of Maxtor BANC1G10 firmware for FUA. If we need
to FUA-blacklist any drives this should likely be added to the existing
horkage mechanism we now have. However, at this point I don't think
that's
from under the SCSI menu into a new ATA menu (in
2.6.19 I think).
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. Eric, do you have any info on the blacklisting of that
Maxtor 7B250S0 drive? I would hope that Silicon Image would have a good
reason for blacklisting that one..
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..
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the commands to the controller, using the
APPEND register. That's another thing that's not in the ADMA standard.
It's curious that only the post-cache-flush command is having issues,
and normal NCQ operation seems fine. Maybe it's related to that tag 0
being reused repeatedly?
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that
calls the kernel build system, and it works fine.
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KERNELDIR := /lib/modules/`uname -r`/build
all::
$(MAKE) -C $(KERNELDIR) M=`pwd` $@
endif
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and never return. It seems to be stuck in the idle
loop().
On FAT filesystems this forces the entire file contents of that size to
be written out with zeros. Are you sure the kernel just isn't busy
writing out all that data to the disk?
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Jeff Garzik wrote:
Robert Hancock wrote:
It's curious that only the post-cache-flush command is having issues,
and normal NCQ operation seems fine. Maybe it's related to that tag 0
being reused repeatedly?
If you take cache flush out of the equation, what happens when NCQ is
enabled
like pata_amd does an
ata_pci_clear_simplex only for certain chip models, maybe this model
needs it as well?
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to the NCQ blacklist.
Max
This does indeed look like a drive side issue to me (the controller is
reporting CPBs with response flags 2 which as far as I can tell
indicates it's still waiting for the drive to complete the request).
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/torvalds/linux-2.6.git;a=commit;h=5e5c74a5e11d1e2a99d03132cc6c4455016db6c2
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rate is should be capable of.
How are you determining this?
Any ideas on how to make it work at full speed?
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at.
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on that drive? The controller is reporting
SError values and CMD errors, which likely tends to indicate some kind
of SATA communication problem..
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it at speeds about 5.5Gbps, that is my
question.
Why is it necessary to avoid bursting? There should be enough buffering
along the chain to avoid packet loss with reasonable burst sizes.
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and the controller is still waiting for a
response.
Could be that this is another drive that needs to be added to the NCQ
blacklist, some similar Maxtor models seem to have issues..
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assigned by the BIOS last, so that we wouldn't try to assign those
until we'd already assigned everything else..
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in
the sata_nv module could trigger an MCE? If not, would you put your money on
the RAM, or could the motherboard be blamed? I hope it's not the CPU ;)
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, I was curious why is NCQ enabled by default?
Normally NCQ is faster, though it depends on the drive firmware. It's
also possible that software RAID is a case where there are negative
interactions.
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(defective RAM? Bad application or device
driver?), please let me know as I'm pulling what
little hair I have left out on this one. Suggestions
on what to try would be greatly appreciated. Thanks!
First try updating to the latest RHEL update kernel, that one's out of date.
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to be personally CC'ed in the answers/comments posted in
response to this post ?
Your compiler is probably too new to be able to compile 2.6.9. You'd
likely be better off trying the latest kernels and making a detailed
report of the problems you're having with it..
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/WhyWritingFilesFromKernelIsBad
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to disable the pagecache?
Not as far as I know, it's unlikely this would be of any benefit.
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to, and yet the drive loses power so it does an emergency retract.
Making the kernel shutdown on reboot would only add more spindown/up
cycles for normally working systems.
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() voluntarily since CONFIG_PREEMPT_VOLUNTARY and
CONFIG_PREEMPT_BKL are both turned on? From my understanding these 2
options should make schedule happen even if CPU is under heavy
load..
No, only CONFIG_PREEMPT will do that.
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such a problem.
So now we wonder if this might be an MCE bug, or really a HW problem,
and if it is one of the CPUs, or the RAM thats faulty.
We are running 2.6.18.
Sounds like some bad RAM..
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, just go for the regular non-NCQ
FUA write. I think that should be safe.
Aside from the issue above, as I mentioned elsewhere, lots of NCQ drives
don't support non-NCQ FUA writes..
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-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c.before_hacking 2007-02-15
18:19:13.0 -0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-15 22:36:02.0
-0600
@@ -219,6 +219,7 @@
void __iomem * gen_block;
void __iomem
. Also, it's been inadvertently tested (it seems that
pata_amd Nvidia cable detection is broken in current -git..)
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20-git6/drivers/ata/libata-core.c 2007-02-11 17:31:19.0
-0600
+++ linux-2.6.20-git6edit/drivers/ata/libata
This patch series contains several fixes for issues I noticed while
debugging some command timeout problems. None of these proved to be
related to that issue, but they fall into the category of things
we should be doing anyway.
Split into separate patches to ease bisecting in case of issues.
Clean up the initialization of the CPB and APRD structures so that we
strictly follow the rules for ordering of writes to the CPB flags and
response flags, and prevent duplicate initialization.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007
When error handling occurs with pending commands, output the contents
of the next CPB count and next CPB index registers as well as the others,
since these may be useful for debugging.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-15 22
We already have code that handles hotplug interrupt indications in ADMA
mode, this turns on the control flag that actually enables these interrupts.
Also fixes some cases in the same functions where a 16-bit register was read
using a readl instead of a readw.
Signed-off-by: Robert Hancock [EMAIL
This edits the taskfile setup to more closely match the way that libata
sends the taskfile for other controllers. This avoids putting taskfile writes
into the CPB buffer that are not needed according to the taskfile flags.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20
, accessing them will likely result in a cache miss.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-15 22:36:02.0
-0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c.delayandfixes 2007-02-19
17:00:14.0 -0600
@@ -853,22
(since that one is known to have
problems) as well as for ITE821x when in smart mode.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
---
Any comments on this version? It's essentially what I posted previously
in libata FUA revisited, except that the default for FUA support remains
off, so
the interrupt before it allows any interrupts
to be enabled. (We have such a quirk for certain network controllers where
the boot ROM can leave the chip generating interrupts on bootup.)
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having
intentionally enabled them. There are a few devices that have had such
issues, but they have been few and far between, certainly not enough to
warrant the complexity of the scheme you propose.
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?
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)
mod_timer(np-oom_kick, jiffies + OOM_REFILL);
Did anyone push this patch into mainline? forcedeth on 2.6.20-git14 is
still completely broken without this patch.
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at least on nForce4 chipsets..
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.
The only thing we need to override as far as ADMA and BMDMA is the
post_internal_cmd callback, where we should only call ata_post_internal_cmd
if we are in port-register mode.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.20-git14edit/drivers/ata/sata_nv.c.before_cleanup 2007-02-20
(especially the latter) seem to be very popular models.
Likely Seagate didn't implement that command since they figured nobody
would use that if they had NCQ..
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Matthew Fredrickson wrote:
On Feb 20, 2007, at 9:43 PM, Robert Hancock wrote:
Matthew Fredrickson wrote:
I have noticed something that might be related as well. I am working
on a device driver that would have periodic data errors due to
exceptionally long interrupt handling latency. I
, do we?
Tejun Heo had a patch for sd that could (optionally) trigger a START
STOP UNIT command to spin the disk down after synchronizing the cache
before shutdown, but I haven't heard anything of it lately..
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can assure you that is an 80-wire cable on that device :-) I suppose
next step is adding debug to see where it is having issues?
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Robert Hancock wrote:
Alan wrote:
Stick some printk calls in drivers/ata/libata-eh.c in ata_eh_suspend, or
turn on all the ATA debug and shutdown, the code should issue a cache
flush followed by a standbynow1 command for each disk.
Alan
I believe it runs on suspend, but we don't run
This patch adds in some NCQ blacklist entries taken from the Silicon
Image Windows drivers' .inf files for the 3124 and 3132 controllers.
These entries were marked as DisableSataQueueing. Assume these are
in their blacklist for a reason and disable NCQ on these drives.
Signed-off-by: Robert
outstanding, since the drive may be issuing spurious completions.
Signed-off-by: Robert Hancock [EMAIL PROTECTED]
--- linux-2.6.21-rc1edit/drivers/ata/sata_nv.c.prev 2007-02-21
22:17:31.0 -0600
+++ linux-2.6.21-rc1edit/drivers/ata/sata_nv.c 2007-02-21 22:22:14.0
-0600
@@ -740,6
a feature
(IMHO).
It's a feature that's in drivers/ide (I believe) but isn't in libata or
the SCSI layer.
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driver could take
advantage of this feature.
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after halting before you power down, you may not
get the noise, since many laptop drives unload the heads after a fairly
short period of inactivity, and so the heads are already unloaded when
the power is shut off.
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..
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active_tag -84148995 sactive 0xf)
Sounds like those are some that we should be blacklisting as well,
unless Eric has a good reason why not (CCing). Can you provide the full
firmware revision strings from those drives, i.e. from hdparm -I?
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Robert Hancock Saskatoon, SK, Canada
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to drive a piece of hardware, does anything define which
driver will get first dibs on attaching to the device when it's
hotplugged? I don't know how this ordering will be enforced in that case.
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daemon to do this, unless the interrupts
are distributed in hardware (which only some machines do).
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they depend on are not guaranteed to work.
Also keep in mind that using these structures probably makes your
program a derivative of the kernel and would require your software to be
released under the GPL.
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[EMAIL PROTECTED] wrote:
On Feb 26, 2:26 pm, Robert Hancock [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] wrote:
My C++ program needs an intrusive list, possibly with RCU
capabilities.The data structurelist_head, defined in /usr/include/
linux/list.h , fits perfectly these needs.
You really
tries to get a mutex but it spends about 16.8% of CPU on 8 core
machine.
Curious that it calls pthread_mutex_trylock (as opposed to
pthread_mutex_lock) so often. Maybe they're doing some kind of mutex
lock busy-looping?
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)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: write cache: enabled, read cache: enabled, doesn't
support DPO
or FUA
Some command timed out, apparently. From this one can't easily say why.
Please send full dmesg.
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,
There is one thing that seems odd, if you do have an nForce4 chipset,
the kernel should be running the SATA controller in ADMA mode in 2.6.20,
but it doesn't seem like it is from your dmesg output. Can you post the
output of lspci -vvn? Also what kind of motherboard is that?
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Robert Hancock
commands. Hopefully this is fixed in 2.6.21-rc. This doesn't seem to be
the issue here, since his system isn't using ADMA mode, for reasons
unclear to me..
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