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Kernel: Don't rewrite the whole file on sys$msync
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3 changed files with 10 additions and 4 deletions
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@ -616,8 +616,12 @@ ErrorOr<FlatPtr> Process::sys$msync(Userspace<void*> address, size_t size, int f
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if (!vmobject.is_shared_inode())
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return 0;
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off_t offset = region->offset_in_vmobject() + address.ptr() - region->range().base().get();
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auto& inode_vmobject = static_cast<Memory::SharedInodeVMObject&>(vmobject);
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TRY(inode_vmobject.sync());
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// FIXME: Handle MS_ASYNC
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TRY(inode_vmobject.sync(offset / PAGE_SIZE, size / PAGE_SIZE));
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// FIXME: Handle MS_INVALIDATE
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// FIXME: If msync() causes any write to a file, the file's st_ctime and st_mtime fields shall be marked for update.
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return 0;
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}
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