- int count = 0;
- bool printed = false;
- bool retry;
- int result;
-
- do {
- retry = false;
- result = ll_page_mkwrite0(vma, vmf->page, &retry);
-
- if (!printed && ++count > 16) {
- CWARN("app(%s): the page %lu of file %lu is under heavy"
- " contention.\n",
- current->comm, vmf->pgoff,
- vma->vm_file->f_dentry->d_inode->i_ino);
- printed = true;
- }
- } while (retry);
-
- switch(result) {
- case 0:
- LASSERT(PageLocked(vmf->page));
- result = VM_FAULT_LOCKED;
- break;
- case -ENODATA:
- case -EFAULT:
- result = VM_FAULT_NOPAGE;
- break;
- case -ENOMEM:
- result = VM_FAULT_OOM;
- break;
- case -EAGAIN:
- result = VM_FAULT_RETRY;
- break;
- default:
- result = VM_FAULT_SIGBUS;
- break;
- }
+#endif
+ int count = 0;
+ bool printed = false;
+ bool retry;
+ bool cached;
+ ktime_t kstart = ktime_get();
+ vm_fault_t result;
+
+ result = pcc_page_mkwrite(vma, vmf, &cached);
+ if (cached)
+ goto out;
+
+ file_update_time(vma->vm_file);
+ do {
+ retry = false;
+ result = ll_page_mkwrite0(vma, vmf->page, &retry);
+
+ if (!printed && ++count > 16) {
+ const struct dentry *de = file_dentry(vma->vm_file);
+
+ CWARN("app(%s): the page %lu of file "DFID" is under heavy contention\n",
+ current->comm, vmf->pgoff,
+ PFID(ll_inode2fid(de->d_inode)));
+ printed = true;
+ }
+ } while (retry);
+
+ switch (result) {
+ case 0:
+ LASSERT(PageLocked(vmf->page));
+ result = VM_FAULT_LOCKED;
+ break;
+ case -ENODATA:
+ case -EFAULT:
+ result = VM_FAULT_NOPAGE;
+ break;
+ case -ENOMEM:
+ result = VM_FAULT_OOM;
+ break;
+ case -EAGAIN:
+ result = VM_FAULT_RETRY;
+ break;
+ default:
+ result = VM_FAULT_SIGBUS;
+ break;
+ }
+
+out:
+ if (result == VM_FAULT_LOCKED) {
+ ll_rw_stats_tally(ll_i2sbi(file_inode(vma->vm_file)),
+ current->pid, vma->vm_file->private_data,
+ cl_offset(NULL, vmf->page->index), PAGE_SIZE,
+ WRITE);
+ ll_stats_ops_tally(ll_i2sbi(file_inode(vma->vm_file)),
+ LPROC_LL_MKWRITE,
+ ktime_us_delta(ktime_get(), kstart));
+ }