lkml.org 
[lkml]   [2010]   [Sep]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 11/17] writeback: make nr_to_write a per-file limit
This ensures full 4MB (or larger) writeback size for large dirty files.

CC: Jan Kara <jack@suse.cz>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
fs/fs-writeback.c | 11 +++++++++++
include/linux/writeback.h | 1 +
2 files changed, 12 insertions(+)

--- linux-next.orig/fs/fs-writeback.c 2010-09-08 13:50:32.000000000 +0800
+++ linux-next/fs/fs-writeback.c 2010-09-08 13:50:35.000000000 +0800
@@ -304,6 +304,8 @@ static int
writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
{
struct address_space *mapping = inode->i_mapping;
+ long per_file_limit = wbc->per_file_limit;
+ long nr_to_write;
unsigned dirty;
int ret;

@@ -339,8 +341,16 @@ writeback_single_inode(struct inode *ino
inode->i_state &= ~I_DIRTY_PAGES;
spin_unlock(&inode_lock);

+ if (per_file_limit) {
+ nr_to_write = wbc->nr_to_write;
+ wbc->nr_to_write = per_file_limit;
+ }
+
ret = do_writepages(mapping, wbc);

+ if (per_file_limit)
+ wbc->nr_to_write += nr_to_write - per_file_limit;
+
/*
* Make sure to wait on the data before writing out the metadata.
* This is important for filesystems that modify metadata on data
@@ -635,6 +645,7 @@ static long wb_writeback(struct bdi_writ
break;

wbc.more_io = 0;
+ wbc.per_file_limit = MAX_WRITEBACK_PAGES;
wbc.nr_to_write = MAX_WRITEBACK_PAGES;
wbc.pages_skipped = 0;

--- linux-next.orig/include/linux/writeback.h 2010-09-08 13:50:32.000000000 +0800
+++ linux-next/include/linux/writeback.h 2010-09-08 13:50:35.000000000 +0800
@@ -44,6 +44,7 @@ struct writeback_control {
extra jobs and livelock */
long nr_to_write; /* Write this many pages, and decrement
this for each page written */
+ long per_file_limit; /* Write this many pages for one file */
long pages_skipped; /* Pages which were not written */

/*



\
 
 \ /
  Last update: 2010-09-12 18:01    [W:0.271 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site