Details
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Bug
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Resolution: Fixed
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Critical
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None
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None
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3
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9223372036854775807
Description
The fast_read stale data workaround from LU-14541 can cause applications to receive a spurious SIGBUS when reclaim runs concurrently with page fault handler for mmaped files.
We tested this patch on a 2.12.6 basis, and disabling fast_read is actually catastrophic in terms of performance on our customer code.
The revert of
LU-14541had already been done several months ago (due to the SIGBUS errors), but we recently found that it was causing the corruptions on mmap'ed pages. Disabling fast_read on top of it is causing a x5 slowdown on the application.So, yes please can we find another solution ?