Messages in this thread Patch in this message | | | Subject | Suspend 2 merge: 15/51: Disable pdflush during suspend. | From | Nigel Cunningham <> | Date | Wed, 24 Nov 2004 23:58:00 +1100 |
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Here we disable pdflush once we've finished syncing data to disk. We might be writing to a swap file, and don't want to corrupt the user's disk by writing invalid data to their superblock.
diff -ruN 504-disable-pdflush-during-suspend-old/mm/page-writeback.c 504-disable-pdflush-during-suspend-new/mm/page-writeback.c --- 504-disable-pdflush-during-suspend-old/mm/page-writeback.c 2004-11-03 21:54:16.000000000 +1100 +++ 504-disable-pdflush-during-suspend-new/mm/page-writeback.c 2004-11-04 16:27:40.000000000 +1100 @@ -29,6 +29,7 @@ #include <linux/sysctl.h> #include <linux/cpu.h> #include <linux/syscalls.h> +#include <linux/suspend.h> /* * The maximum number of pages to writeout in a single bdflush/kupdate @@ -369,6 +370,12 @@ .for_kupdate = 1, }; + if (test_suspend_state(SUSPEND_DISABLE_SYNCING)) { + start_jif = jiffies; + next_jif = start_jif + (dirty_writeback_centisecs * HZ) / 100; + goto out; + } + sync_supers(); get_writeback_state(&wbs); @@ -389,6 +396,8 @@ } nr_to_write -= MAX_WRITEBACK_PAGES - wbc.nr_to_write; } + +out: if (time_before(next_jif, jiffies + HZ)) next_jif = jiffies + HZ; if (dirty_writeback_centisecs)
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