Error paging when kmalloc function is called

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AlexanderSilvaB
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Joined: Tue May 08, 2012 6:19 am

Error paging when kmalloc function is called

Post by AlexanderSilvaB »

Hi, I'm using the file heap.c (http://code.google.com/p/jamesm-tutoria ... ce/browse/ # svn 2Fthe_heap% 2Fbranches% 2Fsrc%) of JamesM, but sometimes I call the function kmalloc error occurs paging. In another tutorial (http://www.jamesmolloy.co.uk/tutorial_html/7.-The 20Heap.html%), the same error does not happen. I'm finding it strange because not always the error occurs. Please can someone help me. Thank you.
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gerryg400
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Re: Error paging when kmalloc function is called

Post by gerryg400 »

I'm finding it strange because not always the error occurs. Please can someone help me. Thank you.
It's quite normal for memory allocation problems to seem intermittent. If there are bugs in your memory management they may depend on the usage pattern. There is nothing special here, the answer is to debug.
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JamesM
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Re: Error paging when kmalloc function is called

Post by JamesM »

AlexanderSilvaB wrote:Hi, I'm using the file heap.c (http://code.google.com/p/jamesm-tutoria ... ce/browse/ # svn 2Fthe_heap% 2Fbranches% 2Fsrc%) of JamesM, but sometimes I call the function kmalloc error occurs paging. In another tutorial (http://www.jamesmolloy.co.uk/tutorial_html/7.-The 20Heap.html%), the same error does not happen. I'm finding it strange because not always the error occurs. Please can someone help me. Thank you.
Try debugging it. It's a lost art.
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AlexanderSilvaB
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Joined: Tue May 08, 2012 6:19 am

Re: Error paging when kmalloc function is called

Post by AlexanderSilvaB »

Here is my debug logs on Bochs (
bochsout.txt
Debug Log on Bochs
(12.67 KiB) Downloaded 80 times
) and VirtualBox (
lmx.log.txt
Debug Log on VirtualBox
(59.72 KiB) Downloaded 72 times
), I understand little about it...
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AlexanderSilvaB
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Joined: Tue May 08, 2012 6:19 am

Re: Error paging when kmalloc function is called

Post by AlexanderSilvaB »

berkus You're right, I'm doing things quickly, first I have to learn more about all this... Thank you...
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JamesM
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Re: Error paging when kmalloc function is called

Post by JamesM »

AlexanderSilvaB wrote:Here is my debug logs on Bochs (
bochsout.txt
) and VirtualBox (
lmx.log.txt
), I understand little about it...
That is not debugging. That is outsourcing debugging.
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orighost
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Joined: Sun May 27, 2012 8:38 pm

Re: Error paging when kmalloc function is called

Post by orighost »

I have ever used this code , but I have not found bugs on kmalloc (fit some problems).
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AlexanderSilvaB
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Joined: Tue May 08, 2012 6:19 am

Re: Error paging when kmalloc function is called

Post by AlexanderSilvaB »

I finally managed to solve the problem was a bug in my code GDT that was influencing the allocation of memory. Thank you all ...
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