summaryrefslogtreecommitdiffstats
path: root/mm/page_ext.c
diff options
context:
space:
mode:
authorHuang Ying <ying.huang@intel.com>2017-05-03 23:54:39 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-04 00:52:10 +0200
commit2872bb2d0a4952ffb721e703555cb73d40b2c2f0 (patch)
tree6f7936193bf981d5aff8f1af8b723dd0c0dabb2b /mm/page_ext.c
parentmm, swap: improve readability via make spin_lock/unlock balanced (diff)
downloadlinux-2872bb2d0a4952ffb721e703555cb73d40b2c2f0.tar.xz
linux-2872bb2d0a4952ffb721e703555cb73d40b2c2f0.zip
mm, swap: avoid lock swap_avail_lock when held cluster lock
Cluster lock is used to protect the swap_cluster_info and corresponding elements in swap_info_struct->swap_map[]. But it is found that now in scan_swap_map_slots(), swap_avail_lock may be acquired when cluster lock is held. This does no good except making the locking more complex and improving the potential locking contention, because the swap_info_struct->lock is used to protect the data structure operated in the code already. Fix this via moving the corresponding operations in scan_swap_map_slots() out of cluster lock. Link: http://lkml.kernel.org/r/20170317064635.12792-3-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: Tim Chen <tim.c.chen@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_ext.c')
0 files changed, 0 insertions, 0 deletions