diff options
| author | Kairui Song <kasong@tencent.com> | 2024-07-30 23:49:20 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-03 21:15:26 -0700 |
| commit | 661383c6111a38c88df61af6bfbcfacd2ff20a67 (patch) | |
| tree | adc1bef70d6a15c53589287bdb4d1e3f419cbcdf /include/linux | |
| parent | 477cb7ba28892eda112c79d8f75d10edabfc3050 (diff) | |
| download | lwn-661383c6111a38c88df61af6bfbcfacd2ff20a67.tar.gz lwn-661383c6111a38c88df61af6bfbcfacd2ff20a67.zip | |
mm: swap: relaim the cached parts that got scanned
This commit implements reclaim during scan for cluster allocator.
Cluster scanning were unable to reuse SWAP_HAS_CACHE slots, which could
result in low allocation success rate or early OOM.
So to ensure maximum allocation success rate, integrate reclaiming with
scanning. If found a range of suitable swap slots but fragmented due to
HAS_CACHE, just try to reclaim the slots.
Link: https://lkml.kernel.org/r/20240730-swap-allocator-v5-8-cb9c148b9297@kernel.org
Signed-off-by: Kairui Song <kasong@tencent.com>
Reported-by: Barry Song <21cnbao@gmail.com>
Cc: Chris Li <chrisl@kernel.org>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/swap.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index c526cd3e7b31..e372122e4f45 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -301,6 +301,7 @@ struct swap_info_struct { /* list of cluster that contains at least one free slot */ struct list_head frag_clusters[SWAP_NR_ORDERS]; /* list of cluster that are fragmented or contented */ + unsigned int frag_cluster_nr[SWAP_NR_ORDERS]; unsigned int lowest_bit; /* index of first free in swap_map */ unsigned int highest_bit; /* index of last free in swap_map */ unsigned int pages; /* total of usable pages of swap */ |