On 12/11/2012 04:08 PM, Ivan Shapovalov wrote:
Hello!
Hello.
With help of Dušan Čolić <dusanc@xxxxxxxxx> who provided his kernel config diff I've found a kernel option which, when disabled, greatly reduces (hopefully to zero, but need time to verify it) corruption rate in reiser4. It's CONFIG_TRANSPARENT_HUGEPAGE (or something which is used by it like CONFIG_COMPACTION or CONFIG_MIGRATION). For now I'm testing it with CONFIG_TRANSPARENT_HUGEPAGE disabled
How long?
on kernel 3.6.10, and everything seems to be OK so far (so the workaround is version- agnostic). Edward, are there any guesses on what can make reiser4 choke on hugepages/compaction/migration?
TBH, no ideas. They (hugepages) are _transparent_. It means we shouldn't suffer in theory ;)
I'm not even barely familiar with the kernel internals. Thanks, Ivan.
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