fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2026-01-03 07:07:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Don't enable write-combine for the Bochs framebuffer device

Browse Source 
While write-combine greatly improves performance on bare metal, QEMU
appears to perform significantly worse when enabling it.
This commit is contained in:
Tom
2022-02-17 20:50:20 -07:00
committed by Andreas Kling
parent c8aae1ac52
commit 413bc9976c
3 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Kernel/Graphics/FramebufferDevice.cpp
View File

@@ -59,8 +59,10 @@ ErrorOr<Memory::Region*> FramebufferDevice::mmap(Process& process, OpenFileDescr
"Framebuffer",
prot,
shared));
if (auto result = m_userspace_framebuffer_region->set_write_combine(true); result.is_error())
dbgln("FramebufferDevice: Failed to enable Write-Combine on Framebuffer: {}", result.error());
if (m_write_combine) {
if (auto result = m_userspace_framebuffer_region->set_write_combine(true); result.is_error())
dbgln("FramebufferDevice: Failed to enable Write-Combine on Framebuffer: {}", result.error());
}
return m_userspace_framebuffer_region;
}