Re: XFS support for ARMv5

[Eric Sandeen <sandeen@sandeen.net>]

oferh@marvell.com wrote:
> Hi,
> 
> I have noticed that XFS on ARMv5TE with latest kernel (2.6.31.6)
> fails to mount after copying some data and reboot the system.
> 
> I get "mount: /dev/sda1: can't read superblock", I understand that
> there were some problems with virtual aliasing that was added to XFS
> some time ago but ARM arch has not dealt with this properly.

when you get that error from mount, look at dmesg to see what really went wrong ...

> Is there any patch for this bug?

This is a big-hammer approach for the aliasing problem:

Index: linux-2.6.25-rc1/fs/xfs/linux-2.6/xfs_buf.c
===================================================================
--- linux-2.6.25-rc1.orig/fs/xfs/linux-2.6/xfs_buf.c
+++ linux-2.6.25-rc1/fs/xfs/linux-2.6/xfs_buf.c
@@ -1172,6 +1172,7 @@ _xfs_buf_ioapply(
 		bio->bi_end_io = xfs_buf_bio_end_io;
 		bio->bi_private = bp;
 
+		flush_dcache_page(bp->b_pages[0]);
 		bio_add_page(bio, bp->b_pages[0], PAGE_CACHE_SIZE, 0);
 		size = 0;
 
@@ -1198,6 +1199,7 @@ next_chunk:
 		if (nbytes > size)
 			nbytes = size;
 
+		flush_dcache_page(bp->b_pages[map_i]);
 		rbytes = bio_add_page(bio, bp->b_pages[map_i], nbytes, offset);
 		if (rbytes < nbytes)
 			break;


 
> xfsprogs version used: 2.10.2
> 
> -Ofer
> 
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