Eric D. Mudama wrote:
Actually, it's possibly worse, since each failure in libata will
generate 3-4 retries. With existing ATA error recovery in the drives,
that's about 3 seconds per retry on average, or 12 seconds per failure.
Multiply that by the number of blocks past the error to complete the
request..
It really beats the alternative of a forced reboot
due to, say, superblock I/O failing because it happened
to get merged with an unrelated I/O which then failed..
Etc..
Definitely an improvement.
The number of retries is an entirely separate issue.
If we really care about it, then we should fix SD_MAX_RETRIES.
The current value of 5 is *way* too high. It should be zero or one.
Cheers
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