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SubjectRe: [BUG] heavy disk access sometimes freezes 2.5.73-mm[123]
Nick Piggin <piggin@cyberone.com.au> wrote:
>
> >I've figured things out a bit more and filed a Bugzilla report:
> >http://bugme.osdl.org/show_bug.cgi?id=877

Barry says the problem started with 2.5.73-mm1. There was a reiserfs patch
added in that kernel.

Does a `patch -R' of this fix it up?


fs/reiserfs/tail_conversion.c | 13 +++++++++++++
1 files changed, 13 insertions(+)

diff -puN fs/reiserfs/tail_conversion.c~reiserfs-unmapped-buffer-fix fs/reiserfs/tail_conversion.c
--- 25/fs/reiserfs/tail_conversion.c~reiserfs-unmapped-buffer-fix 2003-06-27 23:20:15.000000000 -0700
+++ 25-akpm/fs/reiserfs/tail_conversion.c 2003-06-27 23:20:15.000000000 -0700
@@ -143,6 +143,16 @@ void reiserfs_unmap_buffer(struct buffer
}
clear_buffer_dirty(bh) ;
lock_buffer(bh) ;
+ /* Remove the buffer from whatever list it belongs to. We are mostly
+ interested in removing it from per-sb j_dirty_buffers list, to avoid
+ BUG() on attempt to write not mapped buffer */
+ if ( !list_empty(&bh->b_assoc_buffers) && bh->b_page) {
+ struct inode *inode = bh->b_page->mapping->host;
+ struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb);
+ spin_lock(&j->j_dirty_buffers_lock);
+ list_del_init(&bh->b_assoc_buffers);
+ spin_unlock(&j->j_dirty_buffers_lock);
+ }
clear_buffer_mapped(bh) ;
clear_buffer_req(bh) ;
clear_buffer_new(bh);
@@ -180,6 +190,9 @@ unmap_buffers(struct page *page, loff_t
}
bh = next ;
} while (bh != head) ;
+ if ( PAGE_SIZE == bh->b_size ) {
+ ClearPageDirty(page);
+ }
}
}
}
_

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