diff options
| author | Tim Chen <[email protected]> | 2017-02-22 15:45:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-02-22 16:41:30 -0800 |
| commit | 039939a65059852242c823ece685579370bc574f (patch) | |
| tree | 8a708bb7fbca5552aad3f43032b3ff65ae62b28c | |
| parent | 67afa38e012e9581b9b42f2a41dfc56b1280794d (diff) | |
mm/swap: enable swap slots cache usage
Initialize swap slots cache and enable it on swap on. Drain all swap
slots on swap off.
Link: http://lkml.kernel.org/r/07cbc94882fa95d4ac3cfc50b8dce0b1ec231b93.1484082593.git.tim.c.chen@linux.intel.com
Signed-off-by: Tim Chen <[email protected]>
Cc: "Huang, Ying" <[email protected]>
Cc: Aaron Lu <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Huang Ying <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Jonathan Corbet <[email protected]> escreveu:
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Shaohua Li <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/swapfile.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 30a90fd140b7..2cac12cc9abe 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2190,6 +2190,8 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) spin_unlock(&p->lock); spin_unlock(&swap_lock); + disable_swap_slots_cache_lock(); + set_current_oom_origin(); err = try_to_unuse(p->type, false, 0); /* force unuse all pages */ clear_current_oom_origin(); @@ -2197,9 +2199,12 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) if (err) { /* re-insert swap space back into swap_list */ reinsert_swap_info(p); + reenable_swap_slots_cache_unlock(); goto out_dput; } + reenable_swap_slots_cache_unlock(); + flush_work(&p->discard_work); destroy_swap_extents(p); @@ -2886,6 +2891,8 @@ out: putname(name); if (inode && S_ISREG(inode->i_mode)) inode_unlock(inode); + if (!error) + enable_swap_slots_cache(); return error; } |