Re: [PATCH] swapin flush cache bug

From: NIIBE Yutaka (
Date: Tue Feb 13 2001 - 05:53:11 EST

Russell King wrote:
> What was the problem? The old code seems to behave well on a virtual
> address indexed virtual address tagged cache.

My case (SH-4) is: virtual address indexed, physical address tagged cache
(which has alias issue).

Suppose there's I/O to the physical page P asynchronously, and the
page is placed in the swap cache. It remains cache entry, say,
indexed kernel virtual address K. Then, process maps P at U. U and K
(may) indexes differently. The process will get the data from memory
(not the one in the cashe), if it's not flushed.

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This archive was generated by hypermail 2b29 : Thu Feb 15 2001 - 21:00:21 EST