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Kernel: Release MM lock while yielding from inode page fault handler

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We need to make sure other processors can grab the MM lock while we
wait, so release it when we might block. Reading the page from
disk may also block, so release it during that time as well.
This commit is contained in:
Tom 2021-01-23 09:11:45 -07:00 • committed by Andreas Kling
parent ac3927086f
commit 250a310454
4 changed files with 23 additions and 11 deletions
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4
Kernel/VM/SharedInodeVMObject.cpp
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@ -34,8 +34,8 @@ namespace Kernel {
NonnullRefPtr<SharedInodeVMObject> SharedInodeVMObject::create_with_inode(Inode& inode)
{
size_t size = inode.size();
if (inode.shared_vmobject())
return *inode.shared_vmobject();
if (auto shared_vmobject = inode.shared_vmobject())
return shared_vmobject.release_nonnull();
auto vmobject = adopt(*new SharedInodeVMObject(inode, size));
vmobject->inode().set_shared_vmobject(*vmobject);
return vmobject;