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invalidate_mapping_pages(): add cond_resched

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invalidate_mapping_pages() can sometimes take a long time (millions of pages
to free).  Long enough for the softlockup detector to trigger.

We used to have a cond_resched() in there but I took it out because the
drop_caches code calls invalidate_mapping_pages() under inode_lock.

The patch adds a nasty flag and puts the cond_resched() back.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton
2007-07-15 23:38:14 -07:00
committed by Linus Torvalds
parent 45426812d6
commit fc9a07e7bf
3 changed files with 27 additions and 16 deletions
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2
fs/drop_caches.c
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@@ -20,7 +20,7 @@ static void drop_pagecache_sb(struct super_block *sb)
list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
if (inode->i_state & (I_FREEING|I_WILL_FREE))
continue;
invalidate_mapping_pages(inode->i_mapping, 0, -1);
__invalidate_mapping_pages(inode->i_mapping, 0, -1, true);
}
spin_unlock(&inode_lock);
}