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Kernel+SystemMonitor: Expose amount of per-process dirty private memory

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Dirty private memory is all memory in non-inode-backed mappings that's
process-private, meaning it's not shared with any other process.

This patch exposes that number via SystemMonitor, giving us an idea of
how much memory each process is responsible for all on its own.
This commit is contained in:
Andreas Kling 2019-12-29 12:28:32 +01:00
parent ffbe975ffc
commit 0d5e0e4cad
12 changed files with 51 additions and 0 deletions
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13
Kernel/VM/InodeVMObject.cpp
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@ -21,6 +21,7 @@ NonnullRefPtr<VMObject> InodeVMObject::clone()
InodeVMObject::InodeVMObject(Inode& inode)
: VMObject(inode.size())
, m_inode(inode)
, m_dirty_pages(page_count(), false)
{
}
@ -35,6 +36,16 @@ InodeVMObject::~InodeVMObject()
ASSERT(inode().vmobject() == this);
}
size_t InodeVMObject::amount_dirty() const
{
size_t count = 0;
for (int i = 0; i < m_dirty_pages.size(); ++i) {
if (m_dirty_pages.get(i))
++count;
}
return count * PAGE_SIZE;
}
void InodeVMObject::inode_size_changed(Badge<Inode>, size_t old_size, size_t new_size)
{
dbgprintf("VMObject::inode_size_changed: {%u:%u} %u -> %u\n",
@ -46,6 +57,8 @@ void InodeVMObject::inode_size_changed(Badge<Inode>, size_t old_size, size_t new
auto new_page_count = PAGE_ROUND_UP(new_size) / PAGE_SIZE;
m_physical_pages.resize(new_page_count);
m_dirty_pages.grow(new_page_count, false);
// FIXME: Consolidate with inode_contents_changed() so we only do a single walk.
for_each_region([](auto& region) {
region.remap();