From: Hugh Dickins <hugh@veritas.com>

cond_resched each time around the loop in shmem_file_write
and do_shmem_file_read, matching filemap.c.



 mm/shmem.c |    4 ++++
 1 files changed, 4 insertions(+)

diff -puN mm/shmem.c~tmpfs-4-use-cond_resched mm/shmem.c
--- 25/mm/shmem.c~tmpfs-4-use-cond_resched	2003-04-02 22:51:11.000000000 -0800
+++ 25-akpm/mm/shmem.c	2003-04-02 22:51:11.000000000 -0800
@@ -1211,6 +1211,8 @@ shmem_file_write(struct file *file, cons
 		buf += bytes;
 		if (pos > inode->i_size)
 			inode->i_size = pos;
+
+		cond_resched();
 	} while (count);
 
 	*ppos = pos;
@@ -1302,6 +1304,8 @@ static void do_shmem_file_read(struct fi
 		page_cache_release(page);
 		if (ret != nr || !desc->count)
 			break;
+
+		cond_resched();
 	}
 
 	*ppos = ((loff_t) index << PAGE_CACHE_SHIFT) + offset;

_