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authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-22 08:22:48 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-22 08:22:48 -0800
commit8ba8ed54de4dd79bb88ab6cd7dbf2e83d58d6d57 (patch)
treed4d1c687f1b7f58783103b43a04618d8e4019bba /mm
parentbbbc4791cd48ac12996e43c0033b504c79b53639 (diff)
parent468e6a20afaccb67e2a7d7f60d301f90e1c6f301 (diff)
Merge branch 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
* 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: remove vm_dirties and task->dirties writeback: hard throttle 1000+ dd on a slow USB stick mm: Make task in balance_dirty_pages() killable
Diffstat (limited to 'mm')
-rw-r--r--mm/page-writeback.c23
1 files changed, 7 insertions, 16 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index a3278f00523..71252486bc6 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -128,7 +128,6 @@ unsigned long global_dirty_limit;
*
*/
static struct prop_descriptor vm_completions;
-static struct prop_descriptor vm_dirties;
/*
* couple the period to the dirty_ratio:
@@ -154,7 +153,6 @@ static void update_completion_period(void)
{
int shift = calc_period_shift();
prop_change_shift(&vm_completions, shift);
- prop_change_shift(&vm_dirties, shift);
writeback_set_ratelimit();
}
@@ -235,11 +233,6 @@ void bdi_writeout_inc(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL_GPL(bdi_writeout_inc);
-void task_dirty_inc(struct task_struct *tsk)
-{
- prop_inc_single(&vm_dirties, &tsk->dirties);
-}
-
/*
* Obtain an accurate fraction of the BDI's portion.
*/
@@ -1133,17 +1126,17 @@ pause:
pages_dirtied,
pause,
start_time);
- __set_current_state(TASK_UNINTERRUPTIBLE);
+ __set_current_state(TASK_KILLABLE);
io_schedule_timeout(pause);
- dirty_thresh = hard_dirty_limit(dirty_thresh);
/*
- * max-pause area. If dirty exceeded but still within this
- * area, no need to sleep for more than 200ms: (a) 8 pages per
- * 200ms is typically more than enough to curb heavy dirtiers;
- * (b) the pause time limit makes the dirtiers more responsive.
+ * This is typically equal to (nr_dirty < dirty_thresh) and can
+ * also keep "1000+ dd on a slow USB stick" under control.
*/
- if (nr_dirty < dirty_thresh)
+ if (task_ratelimit)
+ break;
+
+ if (fatal_signal_pending(current))
break;
}
@@ -1395,7 +1388,6 @@ void __init page_writeback_init(void)
shift = calc_period_shift();
prop_descriptor_init(&vm_completions, shift);
- prop_descriptor_init(&vm_dirties, shift);
}
/**
@@ -1724,7 +1716,6 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
__inc_zone_page_state(page, NR_DIRTIED);
__inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
__inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTIED);
- task_dirty_inc(current);
task_io_account_write(PAGE_CACHE_SIZE);
}
}