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authorLennart Poettering <lennart@poettering.net>2012-05-04 00:13:20 +0200
committerLennart Poettering <lennart@poettering.net>2012-05-04 00:13:20 +0200
commit6de338a2d9904ef5a67552b024491700523074a3 (patch)
tree5d8807c0bedbd8a7feee1c5bb344bfb20745caaa /units
parent37099707e26ef2c6d215f6e7f17dd46bf6aad586 (diff)
readhead: temporarily lower the kernel's read_ahead_kb setting while collecting
While collecting readahead data we want to know exactly what userspace accesses unblurred by the kernel's read_ahead_kb. Hence lower this during collection, and raise it afterwards. This is mostly based on ideas and code by Auke Kok.
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