diff options
Diffstat (limited to 'Documentation/fb/deferred_io.txt')
-rw-r--r-- | Documentation/fb/deferred_io.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/fb/deferred_io.txt b/Documentation/fb/deferred_io.txt index 63883a892120..748328370250 100644 --- a/Documentation/fb/deferred_io.txt +++ b/Documentation/fb/deferred_io.txt | |||
@@ -7,10 +7,10 @@ IO. The following example may be a useful explanation of how one such setup | |||
7 | works: | 7 | works: |
8 | 8 | ||
9 | - userspace app like Xfbdev mmaps framebuffer | 9 | - userspace app like Xfbdev mmaps framebuffer |
10 | - deferred IO and driver sets up nopage and page_mkwrite handlers | 10 | - deferred IO and driver sets up fault and page_mkwrite handlers |
11 | - userspace app tries to write to mmaped vaddress | 11 | - userspace app tries to write to mmaped vaddress |
12 | - we get pagefault and reach nopage handler | 12 | - we get pagefault and reach fault handler |
13 | - nopage handler finds and returns physical page | 13 | - fault handler finds and returns physical page |
14 | - we get page_mkwrite where we add this page to a list | 14 | - we get page_mkwrite where we add this page to a list |
15 | - schedule a workqueue task to be run after a delay | 15 | - schedule a workqueue task to be run after a delay |
16 | - app continues writing to that page with no additional cost. this is | 16 | - app continues writing to that page with no additional cost. this is |