[PATCH 0/5] [RFC] HWPOISON incremental fixes
From: Wu Fengguang
Date: Thu Jun 11 2009 - 10:54:30 EST
Here are the hwpoison fixes that aims to address Nick and Hugh's concerns.
- the early kill option is dropped for .31. It's obscure option and complex
code and is not must have for .31. Maybe Andi also aims this option for
notifying KVM, but right now KVM is not ready to handle that.
- It seems that even fsync() processes are not easy to catch, so I abandoned
the SIGKILL on fsync() idea. Instead, I choose to fail any attempt to
populate the poisoned file with new pages, so that the corrupted page offset
won't be repopulated with outdated data. This seems to be a safe way to allow
the process to continue running while still be able to promise good (but not
complete) data consistency.
- I didn't implement the PANIC-on-corrupted-data option. Instead, I guess
sending uevent notification to user space will be a more flexible scheme?
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