Details
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Bug
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Resolution: Unresolved
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Minor
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None
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None
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None
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3
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9223372036854775807
Description
VM area marked with VM_WRITE means that pages may be written, but mmap page write may ne ver happen.
It should delay layout write until the actual modification on the file happen in ->page_mkwrite().
Otherwise, it will trigger panic for PCC-RO sanity-pcc test_21f().
Fixes: f2d1c4ee4 ("LU-14647 flr: mmap write/punch does not stale other mirrors")