Messages in this thread | | | Date | Sun, 25 May 2003 22:36:55 -0700 (PDT) | Subject | Re: [patch] cache flush bug in mm/filemap.c (all kernels >= 2.5.30(at least)) | From | "David S. Miller" <> |
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From: Mika Penttilä <mika.penttila@kolumbus.fi> Date: Mon, 26 May 2003 08:36:34 +0300
ah, ok. so there are cache issues even if if the user pte is not established yet? Then it seems natural to couple flush_dcache_page with pte establishing, not at the driver level.
flush_dcache_page() or some architecture level equivalent belongs whereever the kernel uses CPU store instructions to modify a page's contents.
When IDE uses PIO to do a data transfer, the flush belongs there. Right now this is occuring in the architecture defined IDE insw/outsw macros. It very well might be more efficient to do this at a higher level where the total extent of the I/O is known. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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