From: "Matt Reimer" <[EMAIL PROTECTED]> Date: Mon, 4 Dec 2006 23:38:13 -0800
> In light of James Bottomsley's commit[1] declaring that kmap() and > friends now have to take care of coherency issues, is the patch "mm: > D-cache aliasing issue in cow_user_page"[2] correct, or could it > potentially cause a slowdown by calling flush_dcache_page() a second > time (i.e. once in an architecture-specific kmap() implementation, and > once in cow_user_page())? kmap() is a NOP unless HIGHMEM is configured. Therefore, it cannot possibly take care of D-cache aliasing issues across the board. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
