diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 21 |
1 files changed, 6 insertions, 15 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 1e6aec4a2d2..b7749a92021 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1090,7 +1090,6 @@ static void shrink_readahead_size_eio(struct file *filp, * @filp: the file to read * @ppos: current file position * @desc: read_descriptor - * @actor: read method * * This is a generic file read routine, and uses the * mapping->a_ops->readpage() function for the actual low-level stuff. @@ -1099,7 +1098,7 @@ static void shrink_readahead_size_eio(struct file *filp, * of the logic when it comes to error handling etc. */ static void do_generic_file_read(struct file *filp, loff_t *ppos, - read_descriptor_t *desc, read_actor_t actor) + read_descriptor_t *desc) { struct address_space *mapping = filp->f_mapping; struct inode *inode = mapping->host; @@ -1200,13 +1199,14 @@ page_ok: * Ok, we have the page, and it's up-to-date, so * now we can copy it to user space... * - * The actor routine returns how many bytes were actually used.. + * The file_read_actor routine returns how many bytes were + * actually used.. * NOTE! This may not be the same as how much of a user buffer * we filled up (we may be padding etc), so we can only update * "pos" here (the actor routine has to update the user buffer * pointers and the remaining count). */ - ret = actor(desc, page, offset, nr); + ret = file_read_actor(desc, page, offset, nr); offset += ret; index += offset >> PAGE_CACHE_SHIFT; offset &= ~PAGE_CACHE_MASK; @@ -1479,7 +1479,7 @@ generic_file_aio_read(struct kiocb *iocb, const struct iovec *iov, if (desc.count == 0) continue; desc.error = 0; - do_generic_file_read(filp, ppos, &desc, file_read_actor); + do_generic_file_read(filp, ppos, &desc); retval += desc.written; if (desc.error) { retval = retval ?: desc.error; @@ -1616,7 +1616,6 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) struct inode *inode = mapping->host; pgoff_t offset = vmf->pgoff; struct page *page; - bool memcg_oom; pgoff_t size; int ret = 0; @@ -1625,11 +1624,7 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return VM_FAULT_SIGBUS; /* - * Do we have something in the page cache already? Either - * way, try readahead, but disable the memcg OOM killer for it - * as readahead is optional and no errors are propagated up - * the fault stack. The OOM killer is enabled while trying to - * instantiate the faulting page individually below. + * Do we have something in the page cache already? */ page = find_get_page(mapping, offset); if (likely(page) && !(vmf->flags & FAULT_FLAG_TRIED)) { @@ -1637,14 +1632,10 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) * We found the page, so try async readahead before * waiting for the lock. */ - memcg_oom = mem_cgroup_toggle_oom(false); do_async_mmap_readahead(vma, ra, file, page, offset); - mem_cgroup_toggle_oom(memcg_oom); } else if (!page) { /* No page in the page cache at all */ - memcg_oom = mem_cgroup_toggle_oom(false); do_sync_mmap_readahead(vma, ra, file, offset); - mem_cgroup_toggle_oom(memcg_oom); count_vm_event(PGMAJFAULT); mem_cgroup_count_vm_event(vma->vm_mm, PGMAJFAULT); ret = VM_FAULT_MAJOR; |