Sorin,
Depending on the APIs that are called between each call to AllocatePages(),
memory may be allocated or freed which may cause the memory map to change.
You need to make sure there are no API calls that either directly or indirectly
allocate memory between the call to GetMemoryMap() and the call(s) to
AllocatePages().
Even doing an action like printing a message to the console could allocate some
memory.
If actions that allocate memory can not be avoided, you might consider calling
GetMemoryMap() again right before each call to AllocatePages().
Best regards,
Mike
From: Sorin Vinturis [mailto:sorin.vintu...@yahoo.com]
Sent: Thursday, September 05, 2013 1:15 AM
To: Gao, Liming; edk2-devel@lists.sourceforge.net
Subject: Re: [edk2] AllocatePages returns EFI_NOT_FOUND
Liming,
I am allocating memory iterative in each of the free memory blocks retrieved
from the memory map, including 8000, 59000, 100000, 1100000, 14610000,
20200000, and allocation succeeds. The only problem is at 131D0000 address.
>From what I observed, every new memory request is allocated starting with
>131D0000 address. So the problem might be due to a memory leak or an allocated
>buffer which was allocated after the memory map was retrieved and not yet
>freed. This is why the AllocatePages function returns EFI_NOT_FOUND, because
>the requested page is not free/available anymore.
Thanks,
Sorin
________________________________
From: "Gao, Liming" <liming....@intel.com<mailto:liming....@intel.com>>
To: Sorin Vinturis <sorin.vintu...@yahoo.com<mailto:sorin.vintu...@yahoo.com>>;
"edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>"
<edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>>
Sent: Thursday, 5 September 2013, 6:02
Subject: RE: [edk2] AllocatePages returns EFI_NOT_FOUND
Sorin:
When your Shell Application is loaded, it will take some memory. Its taken
memory may conflict with your allocated memory.
Have you tried to allocate other free memory range, such as 14610000,
20200000?
Thanks
Liming
From: Sorin Vinturis [mailto:sorin.vintu...@yahoo.com]
Sent: Wednesday, September 04, 2013 9:51 PM
To: Gao, Liming;
edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>
Subject: Re: [edk2] AllocatePages returns EFI_NOT_FOUND
Hi Liming,
Yes, GetMemoryMap function sees that memory pointed by PhysicaAddress as free -
marked as EfiConventionalMemory -,
but when trying to allocate memory there, using the AllocatePages function, it
fails with EFI_NOT_FOUND status.
Here is the memory map I am retrieving:
PhysicalAddress NoOfPages
8000
80
59000 6
100000 3840
1100000 28416
131D0000 454
14610000 47600
20200000 130564
40005000 564399
100000000 189952
The problem appears when I try to allocate memory at 131D0000 address.
Thanks,
Sorin
________________________________
From: "Gao, Liming" <liming....@intel.com<mailto:liming....@intel.com>>
To: Sorin Vinturis <sorin.vintu...@yahoo.com<mailto:sorin.vintu...@yahoo.com>>;
"edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>"
<edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>>
Sent: Wednesday, 4 September 2013, 12:37
Subject: RE: [edk2] AllocatePages returns EFI_NOT_FOUND
Hi:
Allocation requests of Type AllocateAddress means allocate pages at the
address pointed to by Memory on input. If the requested pages could not be
found, EFI_NOT_FOUND will return.
For your issue, the memory described by PhysicalAddress should not be
available. So, EFI_NOT_FOUND returns. Do you mean that you call GetMemoryMap()
and see the memory pointed by PhysicalAddress is free? If yes, could you show
the free memory layout and PhysicalAddress value?
Thanks
Liming
From: Sorin Vinturis [mailto:sorin.vintu...@yahoo.com]
Sent: Wednesday, September 04, 2013 3:43 PM
To: edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net>
Subject: [edk2] AllocatePages returns EFI_NOT_FOUND
Hi all,
I have an UEFI application in which I try to allocate memory of type
EfiBootServicesData, using the AllocatePages function. In order to find the
next available (unallocated) memory space - of type EfiConventionalMemory - I
use the GetMemoryMap function. The problem which I'm facing is that when I try
to allocate memory at one particular address, the AllocatePages function
returns EFI_NOT_FOUND. This issue happens every time, when the application is
executed, and at the exact memory address; for all remaining free memory blocks
the allocation performs without problems.
I am calling the allocation function as follows:
gBS->AllocatePages ( AllocateAddress, EfiBootServicesData, NumberOfPages,
&PhysicalAddress );
Is this scenario a memory access error?
How should I interpret this?
Thanks,
Sorin
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