From af9cc401ce7452f9d965ba4553d8ffe7f0ed42ee Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Sun, 4 Mar 2018 16:36:01 +0800 Subject: [PATCH] ceph: invalidate pages that beyond EOF in ceph_writepages_start() Dirty pages can be associated with different capsnap. Different capsnap may have different EOF value. So invalidating dirty pages according to the largest EOF value is wrong. Dirty pages beyond EOF, but associated with other capsnap, do not get invalidated. Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/addr.c | 36 ++++++++++++++++++------------------ fs/ceph/inode.c | 11 ----------- 2 files changed, 18 insertions(+), 29 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 4b3cf53d5641..3376822a624e 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -801,7 +801,7 @@ static int ceph_writepages_start(struct address_space *mapping, struct ceph_osd_request *req = NULL; struct ceph_writeback_ctl ceph_wbc; bool should_loop, range_whole = false; - bool stop, done = false; + bool done = false; dout("writepages_start %p (mode=%s)\n", inode, wbc->sync_mode == WB_SYNC_NONE ? "NONE" : @@ -865,8 +865,7 @@ retry: ceph_put_snap_context(last_snapc); last_snapc = snapc; - stop = false; - while (!stop && index <= end) { + while (!done && index <= end) { int num_ops = 0, op_idx; unsigned i, pvec_pages, max_pages, locked_pages = 0; struct page **pages = NULL, **data_pages; @@ -899,16 +898,26 @@ get_more_pages: unlock_page(page); continue; } - if (strip_unit_end && (page->index > strip_unit_end)) { - dout("end of strip unit %p\n", page); + /* only if matching snap context */ + pgsnapc = page_snap_context(page); + if (pgsnapc != snapc) { + dout("page snapc %p %lld != oldest %p %lld\n", + pgsnapc, pgsnapc->seq, snapc, snapc->seq); unlock_page(page); - break; + continue; } if (page_offset(page) >= ceph_wbc.i_size) { dout("%p page eof %llu\n", page, ceph_wbc.i_size); - /* not done if range_cyclic */ - stop = true; + if (ceph_wbc.size_stable || + page_offset(page) >= i_size_read(inode)) + mapping->a_ops->invalidatepage(page, + 0, PAGE_SIZE); + unlock_page(page); + continue; + } + if (strip_unit_end && (page->index > strip_unit_end)) { + dout("end of strip unit %p\n", page); unlock_page(page); break; } @@ -922,15 +931,6 @@ get_more_pages: wait_on_page_writeback(page); } - /* only if matching snap context */ - pgsnapc = page_snap_context(page); - if (pgsnapc != snapc) { - dout("page snapc %p %lld != oldest %p %lld\n", - pgsnapc, pgsnapc->seq, snapc, snapc->seq); - unlock_page(page); - continue; - } - if (!clear_page_dirty_for_io(page)) { dout("%p !clear_page_dirty_for_io\n", page); unlock_page(page); @@ -1143,7 +1143,7 @@ new_request: * we tagged for writeback prior to entering this loop. */ if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) - done = stop = true; + done = true; release_pvec_pages: dout("pagevec_release on %d pages (%p)\n", (int)pvec.nr, diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index c6ec5aa46100..be5f12d0d637 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1867,20 +1867,9 @@ retry: * possibly truncate them.. so write AND block! */ if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { - struct ceph_cap_snap *capsnap; - to = ci->i_truncate_size; - list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { - // MDS should have revoked Frw caps - WARN_ON_ONCE(capsnap->writing); - if (capsnap->dirty_pages && capsnap->size > to) - to = capsnap->size; - } spin_unlock(&ci->i_ceph_lock); dout("__do_pending_vmtruncate %p flushing snaps first\n", inode); - - truncate_pagecache(inode, to); - filemap_write_and_wait_range(&inode->i_data, 0, inode->i_sb->s_maxbytes); goto retry; -- 2.30.2