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References: <BANLkTimAXUtO=oxmLUaHLaRBnGafGP-9kg@mail.gmail.com>
	<20110427171107.GA29196@infradead.org>
Date: Thu, 28 Apr 2011 12:59:11 +0530
Message-ID: <BANLkTi=xpSa2x4vaD4zQjrz3_JSLkC-hgg@mail.gmail.com>
Subject: Re: xfstests 013 - 2.6.35.11 - hang
From: Ajeet Yadav <ajeet.yadav.77@gmail.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
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MIPS32=C2=AE 34K=E2=84=A2 Core
It does not provide  invalidate_kernel_vmap_range() /
flush_kernel_vmap_range() to deal with cache coherency problem
Therefore we provided dma_cache_inv() / dma_cache_wback_inv() , after
that we did not had any coherency problem
But as you saying it still has cache coherency problem, wrt xfstests 001 ?

diff -Nurp -X linux-2.6.35.11/Documentation/dontdiff
linux-2.6.35.11/fs/xfs/linux-2.6/xfs_buf.c
linux-2.6.35.11-dirty/fs/xfs/linux-2.6/xfs_buf.c
--- linux-2.6.35.11/fs/xfs/linux-2.6/xfs_buf.c  2011-02-07
04:04:07.000000000 +0900
+++ linux-2.6.35.11-dirty/fs/xfs/linux-2.6/xfs_buf.c    2011-03-22
18:29:09.000000000 +0900
@@ -1192,7 +1192,7 @@ xfs_buf_bio_end_io(
        xfs_buf_ioerror(bp, -error);

        if (!error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ))
-               invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(b=
p));
+               dma_cache_inv((unsigned long)bp->b_addr, xfs_buf_vmap_len(b=
p));

        do {
                struct page     *page =3D bvec->bv_page;
@@ -1304,7 +1304,7 @@ next_chunk:
 submit_io:
        if (likely(bio->bi_size)) {
                if (xfs_buf_is_vmapped(bp)) {
-                       flush_kernel_vmap_range(bp->b_addr,
+                       dma_cache_wback_inv((unsigned long)bp->b_addr,
                                                xfs_buf_vmap_len(bp));
                }
                submit_bio(rw, bio);

On Wed, Apr 27, 2011 at 10:41 PM, Christoph Hellwig <hch@infradead.org> wro=
te:
> Does 001 also fail for say ext2 and ext3?
>
>