Progress need variety (The Dawn of Haiku OS (Spectrum)) [LWN.net]

Progress need variety (The Dawn of Haiku OS (Spectrum))

Posted May 1, 2012 14:28 UTC (Tue) by whitemice (guest, #3748)
In reply to: Progress need variety (The Dawn of Haiku OS (Spectrum)) by Cyberax
Parent article: The Dawn of Haiku OS (Spectrum)

This may not be terribly helpful - but something *else* is wrong with your box. The settings are dorked, some hardware is not operating correctly, or you have some kind of mismatched kernel

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Progress need variety (The Dawn of Haiku OS (Spectrum))

Posted May 1, 2012 16:20 UTC (Tue) by nybble41 (subscriber, #55106) [Link]

Here are some settings that helped me out with a similar issue:

# Limit total dirty data to 60MB
sysctl vm.dirty_bytes=62914560

# Only use transparent hugepages on request via madvise()
echo madvise > /sys/kernel/mm/transparent_hugepage/enabled

These settings may not be for everyone. In particular, the second issue is supposedly much better in recent (>= 3.3) kernels. However, these changes did get rid of most of my writeback issues.