From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lukas Czerner Date: Tue, 14 May 2013 18:37:22 +0200 Subject: [Cluster-devel] [PATCH v4 08/20] gfs2: use ->invalidatepage() length argument In-Reply-To: <1368549454-8930-1-git-send-email-lczerner@redhat.com> References: <1368549454-8930-1-git-send-email-lczerner@redhat.com> Message-ID: <1368549454-8930-9-git-send-email-lczerner@redhat.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit ->invalidatepage() aop now accepts range to invalidate so we can make use of it in gfs2_invalidatepage(). Signed-off-by: Lukas Czerner Acked-by: Steven Whitehouse Cc: cluster-devel at redhat.com --- fs/gfs2/aops.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index 37093ba..ea920bf 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -947,24 +947,29 @@ static void gfs2_invalidatepage(struct page *page, unsigned int offset, unsigned int length) { struct gfs2_sbd *sdp = GFS2_SB(page->mapping->host); + unsigned int stop = offset + length; + int partial_page = (offset || length < PAGE_CACHE_SIZE); struct buffer_head *bh, *head; unsigned long pos = 0; BUG_ON(!PageLocked(page)); - if (offset == 0) + if (!partial_page) ClearPageChecked(page); if (!page_has_buffers(page)) goto out; bh = head = page_buffers(page); do { + if (pos + bh->b_size > stop) + return; + if (offset <= pos) gfs2_discard(sdp, bh); pos += bh->b_size; bh = bh->b_this_page; } while (bh != head); out: - if (offset == 0) + if (!partial_page) try_to_release_page(page, 0); } -- 1.7.7.6