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Kernel: Never forcibly page in entire executables

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We were doing this for the initial kernel-spawned userspace process(es)
to work around instability in the page fault handler. Now that the page
fault handler is more robust, we can stop worrying about this.

Specifically, the page fault handler was previous not able to handle
getting a page fault in anything but the currently executing task's
page directory.
This commit is contained in:
Andreas Kling 2019-08-26 13:18:17 +02:00
parent e29fd3cd20
commit f5d779f47e
3 changed files with 0 additions and 27 deletions
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20
Kernel/VM/Region.cpp
View file

@ -46,26 +46,6 @@ Region::~Region()
MM.unregister_region(*this);
}
bool Region::page_in()
{
ASSERT(m_page_directory);
ASSERT(vmo().is_inode());
#ifdef MM_DEBUG
dbgprintf("MM: page_in %u pages\n", page_count());
#endif
for (size_t i = 0; i < page_count(); ++i) {
auto& vmo_page = vmo().physical_pages()[first_page_index() + i];
if (vmo_page.is_null()) {
bool success = MM.page_in_from_inode(*this, i);
if (!success)
return false;
continue;
}
MM.remap_region_page(*this, i);
}
return true;
}
NonnullRefPtr<Region> Region::clone()
{
ASSERT(current);