• Eric Sandeen's avatar
    fs: avoid softlockups in s_inodes iterators · 04646aeb
    Eric Sandeen authored
    Anything that walks all inodes on sb->s_inodes list without rescheduling
    risks softlockups.
    
    Previous efforts were made in 2 functions, see:
    
    c27d82f5 fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
    ac05fbb4 inode: don't softlockup when evicting inodes
    
    but there hasn't been an audit of all walkers, so do that now.  This
    also consistently moves the cond_resched() calls to the bottom of each
    loop in cases where it already exists.
    
    One loop remains: remove_dquot_ref(), because I'm not quite sure how
    to deal with that one w/o taking the i_lock.
    Signed-off-by: default avatarEric Sandeen <sandeen@redhat.com>
    Reviewed-by: default avatarJan Kara <jack@suse.cz>
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    04646aeb
dquot.c 78.9 KB