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| author |   Harshad Shirwadkar <harshadshirwadkar@gmail.com> | 2021-04-01 10:21:29 -0700 |
|---|---|---|
| committer |   Theodore Ts'o <tytso@mit.edu> | 2021-04-09 11:34:59 -0400 |
| commit | 21175ca434c5d49509b73cf473618b01b0b85437 (patch) | |
| tree | 80443841bc6ac0c66e1ad6a4fe479ebc1d2fefd8 /fs/ext4/super.c | |
| parent | ext4: add proc files to monitor new structures (diff) | |
| download | linux-dev-21175ca434c5d49509b73cf473618b01b0b85437.tar.xz linux-dev-21175ca434c5d49509b73cf473618b01b0b85437.zip | |
ext4: make prefetch_block_bitmaps default
Block bitmap prefetching is needed for these allocator optimization
data structures to get populated and provide better group scanning
order. So, turn it on bu default. prefetch_block_bitmaps mount option
is now marked as removed and a new option no_prefetch_block_bitmaps is
added to disable block bitmap prefetching.
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20210401172129.189766-8-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 3b12deb93a6b..0f9af7ba9210 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1688,7 +1688,7 @@ enum { Opt_dioread_nolock, Opt_dioread_lock, Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, - Opt_prefetch_block_bitmaps, Opt_mb_optimize_scan, + Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, #ifdef CONFIG_EXT4_DEBUG Opt_fc_debug_max_replay, Opt_fc_debug_force #endif @@ -1788,7 +1788,8 @@ static const match_table_t tokens = { {Opt_inlinecrypt, "inlinecrypt"}, {Opt_nombcache, "nombcache"}, {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ - {Opt_prefetch_block_bitmaps, "prefetch_block_bitmaps"}, + {Opt_removed, "prefetch_block_bitmaps"}, + {Opt_no_prefetch_block_bitmaps, "no_prefetch_block_bitmaps"}, {Opt_mb_optimize_scan, "mb_optimize_scan=%d"}, {Opt_removed, "check=none"}, /* mount option from ext2/3 */ {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ @@ -2010,7 +2011,7 @@ static const struct mount_opts { {Opt_max_dir_size_kb, 0, MOPT_GTE0}, {Opt_test_dummy_encryption, 0, MOPT_STRING}, {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, - {Opt_prefetch_block_bitmaps, EXT4_MOUNT_PREFETCH_BLOCK_BITMAPS, + {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, MOPT_SET}, {Opt_mb_optimize_scan, EXT4_MOUNT2_MB_OPTIMIZE_SCAN, MOPT_GTE0}, #ifdef CONFIG_EXT4_DEBUG @@ -3707,11 +3708,11 @@ static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, elr->lr_super = sb; elr->lr_first_not_zeroed = start; - if (test_opt(sb, PREFETCH_BLOCK_BITMAPS)) - elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; - else { + if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { elr->lr_mode = EXT4_LI_MODE_ITABLE; elr->lr_next_group = start; + } else { + elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; } /* @@ -3742,7 +3743,7 @@ int ext4_register_li_request(struct super_block *sb, goto out; } - if (!test_opt(sb, PREFETCH_BLOCK_BITMAPS) && + if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && (first_not_zeroed == ngroups || sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE))) goto out; |