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| author | Henry C Chang <henry_c_chang@tcloudcomputing.com> | 2010-12-15 20:45:41 -0800 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-12-17 09:54:40 -0800 |
| commit | b6aa5901c7a2bd90d0b6b9866300d2648b2568f3 (patch) | |
| tree | 1161ed9dbacb7ace73c5d48fc9acd1db0d7815d5 /fs/ceph/file.c | |
| parent | 92cf765237e2787eb168096305c448caf25ac7f8 (diff) | |
| download | lwn-b6aa5901c7a2bd90d0b6b9866300d2648b2568f3.tar.gz lwn-b6aa5901c7a2bd90d0b6b9866300d2648b2568f3.zip | |
ceph: mark user pages dirty on direct-io reads
For read operation, we have to set the argument _write_ of get_user_pages
to 1 since we will write data to pages. Also, we need to SetPageDirty before
releasing these pages.
Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/file.c')
| -rw-r--r-- | fs/ceph/file.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index e860d8f1bb45..7d0e4a82d898 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -384,7 +384,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, if (file->f_flags & O_DIRECT) { num_pages = calc_pages_for((unsigned long)data, len); - pages = ceph_get_direct_page_vector(data, num_pages); + pages = ceph_get_direct_page_vector(data, num_pages, true); } else { num_pages = calc_pages_for(off, len); pages = ceph_alloc_page_vector(num_pages, GFP_NOFS); @@ -413,7 +413,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, done: if (file->f_flags & O_DIRECT) - ceph_put_page_vector(pages, num_pages); + ceph_put_page_vector(pages, num_pages, true); else ceph_release_page_vector(pages, num_pages); dout("sync_read result %d\n", ret); @@ -522,7 +522,7 @@ more: return -ENOMEM; if (file->f_flags & O_DIRECT) { - pages = ceph_get_direct_page_vector(data, num_pages); + pages = ceph_get_direct_page_vector(data, num_pages, false); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto out; @@ -572,7 +572,7 @@ more: } if (file->f_flags & O_DIRECT) - ceph_put_page_vector(pages, num_pages); + ceph_put_page_vector(pages, num_pages, false); else if (file->f_flags & O_SYNC) ceph_release_page_vector(pages, num_pages); |