I have implented an I/O scheduler in Linux 2.6.But when I use fio to
test it,the kernel message often print some words,like this
"deadline_rb: forced dispatching is broken (nr_sorted=1),please report
this"
I have no idea about it,maybe my scheduler has some problems.But I
want to know why!
Thank
I have implented an I/O scheduler in Linux 2.6.But when I use fio to
test it,the kernel message often print some words,like this
deadline_rb: forced dispatching is broken (nr_sorted=1),please report
this
I have no idea about it,maybe my scheduler has some problems.But I
want to know why!
Thank
Is In IO scheduler add_request and dispatch_request asynchronous or
synchronous??
In kernel,add request and dispatch request is asynchronous or synchronous?
" __make_request" first do add,then do dispatch,is right?
Does Add request and dispatch request have each other's thread???
Thank you!
-- Forwarded message --
From: 韩磊
Date: 2013/11/17
Subject: How to inital FIFO ticket spinlock in kernel 2.6.34.14?
To: Linux Kernel Mailing List
How to inital FIFO ticket spinlock in kernel 2.6.34.14?
Thank you!
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-- Forwarded message --
From: 韩磊 bonben1...@gmail.com
Date: 2013/11/17
Subject: How to inital FIFO ticket spinlock in kernel 2.6.34.14?
To: Linux Kernel Mailing List linux-kernel@vger.kernel.org
How to inital FIFO ticket spinlock in kernel 2.6.34.14?
Thank you!
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To unsubscribe
Is In IO scheduler add_request and dispatch_request asynchronous or
synchronous??
In kernel,add request and dispatch request is asynchronous or synchronous?
__make_request first do add,then do dispatch,is right?
Does Add request and dispatch request have each other's thread???
Thank you!
--
when we delete,add,search,amend the list_head,should we use spinlock
or rcu in case of conflicit to list_head???
Thank you!
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-- Forwarded message --
From: 韩磊
Date: 2013/11/16
Subject: About deadline IO scheduler in kernel
To: Linux Kernel Mailing List
In deadline scheduler, in a FIFO list when a request insert it and
other request remove it in the same time,whether it make conflict???
Whether
-- Forwarded message --
From: 韩磊 bonben1...@gmail.com
Date: 2013/11/16
Subject: About deadline IO scheduler in kernel
To: Linux Kernel Mailing List linux-kernel@vger.kernel.org
In deadline scheduler, in a FIFO list when a request insert it and
other request remove it in the same
when we delete,add,search,amend the list_head,should we use spinlock
or rcu in case of conflicit to list_head???
Thank you!
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-- Forwarded message --
From: 韩磊
Date: 2013/11/16
Subject: About deadline IO scheduler in kernel
To: Linux Kernel Mailing List
In deadline scheduler, in a FIFO list when a request insert it and
other request remove it in the same time,whether it make conflict???
Whether
-- Forwarded message --
From: 韩磊 bonben1...@gmail.com
Date: 2013/11/16
Subject: About deadline IO scheduler in kernel
To: Linux Kernel Mailing List linux-kernel@vger.kernel.org
In deadline scheduler, in a FIFO list when a request insert it and
other request remove it in the same
In deadline scheduler, in a FIFO list when a request insert it and
other request remove it in the same time,whether it make conflict???
Whether it need lock??
Thank you!
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the body of a message to
-- Forwarded message --
From: 韩磊
Date: 2013/11/15
Subject: A problem about IO scheduler in kernel
To: Linux Kernel Mailing List
These days I was programming about IO scheduler called
"Simple_Deadline" in kernel.
"Simple_Deadline" is based on "deadli
-- Forwarded message --
From: 韩磊 bonben1...@gmail.com
Date: 2013/11/15
Subject: A problem about IO scheduler in kernel
To: Linux Kernel Mailing List linux-kernel@vger.kernel.org
These days I was programming about IO scheduler called
Simple_Deadline in kernel.
Simple_Deadline
In deadline scheduler, in a FIFO list when a request insert it and
other request remove it in the same time,whether it make conflict???
Whether it need lock??
Thank you!
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the body of a message to majord...@vger.kernel.org
-- Forwarded message --
From: 韩磊
Date: 2013/11/15
Subject: A problem about IO scheduler in kernel
To: Linux Kernel Mailing List
These days I was programming about IO scheduler called
"Simple_Deadline" in kernel.
"Simple_Deadline" is based on "deadli
These days I was programming about IO scheduler called
"Simple_Deadline" in kernel.
"Simple_Deadline" is based on "deadline-iosched".The algorithm is very
simple.It have two lists,one is read,the other is write.A request
enter lists based its weight which count accord to the request's
size,read or
These days I was programming about IO scheduler called
Simple_Deadline in kernel.
Simple_Deadline is based on deadline-iosched.The algorithm is very
simple.It have two lists,one is read,the other is write.A request
enter lists based its weight which count accord to the request's
size,read or
-- Forwarded message --
From: 韩磊 bonben1...@gmail.com
Date: 2013/11/15
Subject: A problem about IO scheduler in kernel
To: Linux Kernel Mailing List linux-kernel@vger.kernel.org
These days I was programming about IO scheduler called
Simple_Deadline in kernel.
Simple_Deadline
I need a API in linux kernel about the disk's total count of
sector,not the sector size.
thank you!
2013/11/11 韩磊 :
> Thank you! I need disk's total count of sector,not the sector size.
>
> 2013/11/11 Mihai Donțu :
>> On Mon, 11 Nov 2013 20:31:14 +0800 韩磊 wrote:
>>>
Thank you very much!
2013/11/12 Jeff Moyer :
> 韩磊 writes:
>
>> In IO scheduler level, whether all the read requests are synchronous?
>
> Generically, yes, I/O schedulers (and the whole block layer, in fact)
> consider READs synchronous:
>
> /*
> * We regard a req
-- Forwarded message --
From: 韩磊
Date: 2013/11/10
Subject: About read/write requests in IO scheduler
To: Linux Kernel Mailing List
In IO scheduler level, whether all the read requests are synchronous?
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Thank you! I need disk's total count of sector,not the sector size.
2013/11/11 Mihai Donțu :
> On Mon, 11 Nov 2013 20:31:14 +0800 韩磊 wrote:
>> Can you tell me the API about the count of sector in linux kernel?
>>
>> which .h file and function?
>>
>
Can you tell me the API about the count of sector in linux kernel?
which .h file and function?
Thank you!
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Can you tell me the API about the count of sector in linux kernel?
which .h file and function?
Thank you!
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Thank you! I need disk's total count of sector,not the sector size.
2013/11/11 Mihai Donțu mihai.do...@gmail.com:
On Mon, 11 Nov 2013 20:31:14 +0800 韩磊 wrote:
Can you tell me the API about the count of sector in linux kernel?
which .h file and function?
Looking at fdisk (util-linux
-- Forwarded message --
From: 韩磊 bonben1...@gmail.com
Date: 2013/11/10
Subject: About read/write requests in IO scheduler
To: Linux Kernel Mailing List linux-kernel@vger.kernel.org
In IO scheduler level, whether all the read requests are synchronous?
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To unsubscribe from
Thank you very much!
2013/11/12 Jeff Moyer jmo...@redhat.com:
韩磊 bonben1...@gmail.com writes:
In IO scheduler level, whether all the read requests are synchronous?
Generically, yes, I/O schedulers (and the whole block layer, in fact)
consider READs synchronous:
/*
* We regard a request
I need a API in linux kernel about the disk's total count of
sector,not the sector size.
thank you!
2013/11/11 韩磊 bonben1...@gmail.com:
Thank you! I need disk's total count of sector,not the sector size.
2013/11/11 Mihai Donțu mihai.do...@gmail.com:
On Mon, 11 Nov 2013 20:31:14 +0800 韩磊
The disk sector
2013/11/10 韩磊 :
> I need the count of sector,but I don't know how to get it.
> Could you give me some favour?
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In IO scheduler level, whether all the read requests are synchronous?
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Please read the FAQ at
I need the count of sector,but I don't know how to get it.
Could you give me some favour?
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Please read
I need the count of sector,but I don't know how to get it.
Could you give me some favour?
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Please read
In IO scheduler level, whether all the read requests are synchronous?
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The disk sector
2013/11/10 韩磊 bonben1...@gmail.com:
I need the count of sector,but I don't know how to get it.
Could you give me some favour?
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Thank you! I still have a long way to go in kernel.
2013/11/1 Andreas Mohr :
> Hi,
>
>> May I can use the ''double" as a basic variables?
>
> [see other replies]
>
>
> Look into terminus technicus "scaling math" as a replacement technique
> (in-kernel this is being used e.g. by
May I can use the ''double" as a basic variables?
When I define the "double" as a function return type in linux kernel,the error
is "error: SSE register return with SSE disabled".
How to fix it??
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May I can use the ''double as a basic variables?
When I define the double as a function return type in linux kernel,the error
is error: SSE register return with SSE disabled.
How to fix it??
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To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to
Thank you! I still have a long way to go in kernel.
2013/11/1 Andreas Mohr a...@lisas.de:
Hi,
May I can use the ''double as a basic variables?
[see other replies]
Look into terminus technicus scaling math as a replacement technique
(in-kernel this is being used e.g. by
Thanks for your thought! It may not make much sense. Because I think
the probability of two bios have the same start sector and the
situation mentioned by Ming Lei is too low.
Thanks ,
Bonben
2013/10/25 Ming Lei :
> On Wed, Oct 23, 2013 at 6:59 PM, Jan Kara wrote:
>> On Wed 23-10-13 08
2013/10/23 Jan Kara :
> On Wed 23-10-13 08:47:44, 韩磊 wrote:
>> Nowadays,the IO schedulers in linux kernel have four types:
>>
>> deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
>> not a good scheduler for SSD,dealine may be a good choice.
&
2013/10/23 Jan Kara j...@suse.cz:
On Wed 23-10-13 08:47:44, 韩磊 wrote:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
not a good scheduler for SSD,dealine may be a good choice.
That doesn't make much
:
On Wed 23-10-13 08:47:44, 韩磊 wrote:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ
is not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ
is not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ
is not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ
is not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
Nowadays,the IO schedulers in linux kernel have four types:
deadline,noop,Anticiptory and CFQ.CFQ is the default scheduler.But CFQ is
not a good scheduler for SSD,dealine may be a good choice.
When deadline runs,it has a mount of computation about merging and
sorting.Merge has three types:
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