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authormarcel <marcel@FreeBSD.org>2009-07-12 03:53:52 +0000
committermarcel <marcel@FreeBSD.org>2009-07-12 03:53:52 +0000
commitadf36bcfeec610af843f3052d2f841608a9e9093 (patch)
tree5744a17f2e68f9b39b81e9ee5affd4e4375841bf /lib/libc
parent0c0e79f64e206dc5024b6bd64f8fb62ca80668fd (diff)
downloadFreeBSD-src-adf36bcfeec610af843f3052d2f841608a9e9093.zip
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Revert rev 192323 (nfs_common.c only):
The D-cache flushing added here was to deal with I-cache incoherency observed on ia64. However, the problem was in the implementation of pmap_enter_object() for ia64: it was missing I-cache coherency logic for prefaulted pages. After this got added in rev 195625, testing showed that no D-cache flushing was required. The SIGILL that was observed on Book-E (see commit log for rev 192323) ended up not being related to I-cache incoherency, but was found to be caused by bad memory. This discovery further undermined the need for D-cache flushing in the NFS I/O code, triggering the reversal. Approved by: re (kensmith)
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