[mem][linux]: Remove deprecated opt-out for MemAvailable-based Used#2012
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[mem][linux]: Remove deprecated opt-out for MemAvailable-based Used#2012
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…alculation Remove WillBeDeletedOptOutMemAvailableCalc constant and the associated opt-out code path that was scheduled for removal in March 2026. The old formula (Total - Free - Buffers - Cached) is no longer available. mem.Used is now always calculated as Total - Available, consistent with modern procps-ng tools (free, top) since v4.0.1. Closes #1873
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Summary
WillBeDeletedOptOutMemAvailableCalcconstant and opt-out code path for the oldmem.Usedcalculationmem.Usedis now always calculated asTotal - Available, consistent with modernfree/top(procps-ng v4.0.1+)Breaking Change
The
WillBeDeletedOptOutMemAvailableCalcconstant is removed. Code using this context key to opt out of the new calculation will fail to compile. Remove the opt-out usage — the new formula is the correct one.See #1873 for background.