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| author | Sage Weil <sage@newdream.net> | 2011-06-07 20:57:14 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-06-13 16:26:10 -0700 |
| commit | 773e9b442693b250aa6c452cb0cf5a9343f51cef (patch) | |
| tree | dbd2d9eacab7272c8ec8ba19a32ea92c559141bf /fs | |
| parent | 0c1f91f27140cf3b6e38dc4e892adac241c73a20 (diff) | |
| download | linux-773e9b442693b250aa6c452cb0cf5a9343f51cef.tar.gz linux-773e9b442693b250aa6c452cb0cf5a9343f51cef.tar.bz2 linux-773e9b442693b250aa6c452cb0cf5a9343f51cef.zip | |
ceph: fix page alignment corrections
dd if=/dev/urandom of=/mnt/fs_depot/dd10 bs=500 seek=8388 count=1
dd if=/mnt/fs_depot/dd10 of=/root/dd10out bs=500 skip=8388 count=1
Reported-by: Henry C Chang <henry.cy.chang@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/file.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 9542f07d0b93..2be0f35afdfb 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -290,7 +290,6 @@ static int striped_read(struct inode *inode, struct ceph_inode_info *ci = ceph_inode(inode); u64 pos, this_len; int io_align, page_align; - int page_off = off & ~PAGE_CACHE_MASK; /* first byte's offset in page */ int left, pages_left; int read; struct page **page_pos; @@ -326,12 +325,11 @@ more: ret, hit_stripe ? " HITSTRIPE" : "", was_short ? " SHORT" : ""); if (ret > 0) { - int didpages = - ((pos & ~PAGE_CACHE_MASK) + ret) >> PAGE_CACHE_SHIFT; + int didpages = (page_align + ret) >> PAGE_CACHE_SHIFT; if (read < pos - off) { dout(" zero gap %llu to %llu\n", off + read, pos); - ceph_zero_page_vector_range(page_off + read, + ceph_zero_page_vector_range(page_align + read, pos - off - read, pages); } pos += ret; @@ -356,7 +354,7 @@ more: left = inode->i_size - pos; dout("zero tail %d\n", left); - ceph_zero_page_vector_range(page_off + read, left, + ceph_zero_page_vector_range(page_align + read, left, pages); read += left; } |