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Chris Lu
ae4839e005
Sealing a logic chunk index that already held a sealed chunk dropped the old chunk's only reference and freed its page chunk. That chunk's upload may not have started reading it yet — Execute() returns as soon as the job is handed to a goroutine — so mem.Free could hand a live 2 MiB mem chunk back to the slot pool, the next NewMemChunk would overwrite it, and the in-flight upload shipped whatever bytes were there. Under fio randwrite the volume server rejected those needles with "Content-MD5 did not match md5 of file data" and the FUSE write failed with EIO. Give the sealed chunk a second reference for its upload, dropped only by the upload itself, and let the upload unindex itself only while it still owns the index — the unconditional delete could evict a newer sealed chunk and hide its dirty pages from readers.