inode_congested — test whether an inode is congested
int inode_congested ( | struct inode * inode, |
int cong_bits); |
inodeinode to test for congestion (may be NULL)
cong_bitsmask of WB_[a]sync_congested bits to test
Tests whether inode is congested. cong_bits is the mask of congestion
bits to test and the return value is the mask of set bits.
If cgroup writeback is enabled for inode, the congestion state is
determined by whether the cgwb (cgroup bdi_writeback) for the blkcg
associated with inode is congested; otherwise, the root wb's congestion
state is used.
inode is allowed to be NULL as this function is often called on
mapping->host which is NULL for the swapper space.