Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: 996e740cc83aa499d91b3ab3ae857dab7578e05c
https://github.com/tianocore/edk2/commit/996e740cc83aa499d91b3ab3ae857dab7578e05c
Author: Jeremy Compostella <[email protected]>
Date: 2024-10-17 (Thu, 17 Oct 2024)
Changed paths:
M MdeModulePkg/Core/Pei/Memory/MemoryServices.c
Log Message:
-----------
MdeModulePkg: Fix PeiAllocatePages() corner case
I recently ran into an AllocatePages() hang. It turns out that
AllocatePages() does not account for the Memory Allocation HOB when it
makes the decision of allocating out of free memory.
Here is the scenario:
FreeMemoryTop - 0x71C03000
FreeMemoryBottom - 0x71BDBFD8
=> We have 159,784 bytes left => ~39.0098 pages left.
We attempt to allocate 39 pages. There are enough pages left but
allocating those pages requires to allocate a Memory Allocation HOB
which needs an extra 48 bytes. But once the pages are allocated,
there are only 40 bytes left.
In addition to taking into account the Memory Allocation HOB size,
this commit reverses the condition to keep it simple.
Signed-off-by: Jeremy Compostella <[email protected]>
Commit: 866abb233817eb349fa5fe2b32283e990a8e5056
https://github.com/tianocore/edk2/commit/866abb233817eb349fa5fe2b32283e990a8e5056
Author: Jeremy Compostella <[email protected]>
Date: 2024-10-17 (Thu, 17 Oct 2024)
Changed paths:
M MdeModulePkg/Core/Pei/Memory/MemoryServices.c
Log Message:
-----------
MdeModulePkg: Replace right bit shift operator with RShiftU64
Instead of using bit shift operations, it is preferable to use BaseLib
bit shift functions to prevent compilers from inserting intrinsics.
Signed-off-by: Jeremy Compostella <[email protected]>
Compare: https://github.com/tianocore/edk2/compare/1b70dcd37576...866abb233817
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