[PATCH 09/12] mm: count unstable pages per BDI

[Peter Zijlstra]

Count per BDI unstable pages.

Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
---
 fs/nfs/write.c              |    4 ++++
 include/linux/backing-dev.h |    1 +
 2 files changed, 5 insertions(+)

Index: linux-2.6-mm/fs/nfs/write.c
===================================================================
--- linux-2.6-mm.orig/fs/nfs/write.c
+++ linux-2.6-mm/fs/nfs/write.c
@@ -449,6 +449,7 @@ nfs_mark_request_commit(struct nfs_page 
        nfsi->ncommit++;
        spin_unlock(&nfsi->req_lock);
        inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+       inc_bdi_stat(req->wb_page->mapping->backing_dev_info, BDI_UNSTABLE);
        __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
 }
 #endif
@@ -509,6 +510,7 @@ static void nfs_cancel_commit_list(struc
        while(!list_empty(head)) {
                req = nfs_list_entry(head->next);
                dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+               dec_bdi_stat(req->wb_page->mapping->backing_dev_info, 
BDI_UNSTABLE);
                nfs_list_remove_request(req);
                nfs_inode_remove_request(req);
                nfs_unlock_request(req);
@@ -1234,6 +1236,7 @@ nfs_commit_list(struct inode *inode, str
                nfs_list_remove_request(req);
                nfs_mark_request_commit(req);
                dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+               dec_bdi_stat(req->wb_page->mapping->backing_dev_info, 
BDI_UNSTABLE);
                nfs_clear_page_writeback(req);
        }
        return -ENOMEM;
@@ -1258,6 +1261,7 @@ static void nfs_commit_done(struct rpc_t
                req = nfs_list_entry(data->pages.next);
                nfs_list_remove_request(req);
                dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
+               dec_bdi_stat(req->wb_page->mapping->backing_dev_info, 
BDI_UNSTABLE);
 
                dprintk("NFS: commit (%s/%Ld [EMAIL PROTECTED])",
                        req->wb_context->dentry->d_inode->i_sb->s_id,
Index: linux-2.6-mm/include/linux/backing-dev.h
===================================================================
--- linux-2.6-mm.orig/include/linux/backing-dev.h
+++ linux-2.6-mm/include/linux/backing-dev.h
@@ -28,6 +28,7 @@ typedef int (congested_fn)(void *, int);
 enum bdi_stat_item {
        BDI_DIRTY,
        BDI_WRITEBACK,
+       BDI_UNSTABLE,
        NR_BDI_STAT_ITEMS
 };
 

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