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Replace zones with individually tracked physical pages.

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It's just a simple struct { ref_count, paddr }.
This will allow me to implement lazy zeroing and COW pages.
This commit is contained in:
Andreas Kling 2018-11-05 10:23:00 +01:00
parent b5c5286ee1
commit 72cdc62155
10 changed files with 161 additions and 127 deletions
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12
Kernel/ProcFileSystem.cpp
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@ -49,7 +49,7 @@ ByteBuffer procfs$pid_vm(Process& process)
{
ProcessInspectionScope scope(process);
char* buffer;
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 80, buffer);
auto stringImpl = StringImpl::createUninitialized(80 + process.regionCount() * 80 + 4096, buffer);
memset(buffer, 0, stringImpl->length());
char* ptr = buffer;
ptr += ksprintf(ptr, "BEGIN END SIZE NAME\n");
@ -59,6 +59,10 @@ ByteBuffer procfs$pid_vm(Process& process)
region->linearAddress.offset(region->size - 1).get(),
region->size,
region->name.characters());
for (auto& physical_page : region->physical_pages) {
ptr += ksprintf(ptr, "P%x ", physical_page ? physical_page->paddr().get() : 0);
}
ptr += ksprintf(ptr, "\n");
}
*ptr = '\0';
return ByteBuffer::copy((byte*)buffer, ptr - buffer);
@ -130,6 +134,8 @@ void ProcFileSystem::removeProcess(Process& process)
ByteBuffer procfs$mm()
{
// FIXME: Implement
#if 0
InterruptDisabler disabler;
size_t zonePageCount = 0;
for (auto* zone : MM.m_zones)
@ -143,9 +149,11 @@ ByteBuffer procfs$mm()
ptr += ksprintf(ptr, "\n");
}
ptr += ksprintf(ptr, "Zone count: %u\n", MM.m_zones.size());
ptr += ksprintf(ptr, "Free physical pages: %u\n", MM.m_freePages.size());
ptr += ksprintf(ptr, "Free physical pages: %u\n", MM.m_free_physical_pages.size());
buffer.trim(ptr - (char*)buffer.pointer());
return buffer;
#endif
return { };
}