diff options
| -rw-r--r-- | fs/ext4/mballoc.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index df02951..78e58f7 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2011,7 +2011,12 @@ void ext4_mb_scan_aligned(struct ext4_allocation_context *ac, } } -/* This is now called BEFORE we load the buddy bitmap. */ +/* + * This is now called BEFORE we load the buddy bitmap. + * Returns either 1 or 0 indicating that the group is either suitable + * for the allocation or not. In addition it can also return negative + * error code when something goes wrong. + */ static int ext4_mb_good_group(struct ext4_allocation_context *ac, ext4_group_t group, int cr) { @@ -2034,7 +2039,7 @@ static int ext4_mb_good_group(struct ext4_allocation_context *ac, if (unlikely(EXT4_MB_GRP_NEED_INIT(grp))) { int ret = ext4_mb_init_group(ac->ac_sb, group); if (ret) - return 0; + return ret; } fragments = grp->bb_fragments; @@ -2081,7 +2086,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac) { ext4_group_t ngroups, group, i; int cr; - int err = 0; + int err = 0, first_err = 0; struct ext4_sb_info *sbi; struct super_block *sb; struct ext4_buddy e4b; @@ -2148,6 +2153,7 @@ repeat: group = ac->ac_g_ex.fe_group; for (i = 0; i < ngroups; group++, i++) { + int ret = 0; cond_resched(); /* * Artificially restricted ngroups for non-extent @@ -2157,8 +2163,12 @@ repeat: group = 0; /* This now checks without needing the buddy page */ - if (!ext4_mb_good_group(ac, group, cr)) + ret = ext4_mb_good_group(ac, group, cr); + if (ret <= 0) { + if (!first_err) + first_err = ret; continue; + } err = ext4_mb_load_buddy(sb, group, &e4b); if (err) @@ -2170,9 +2180,12 @@ repeat: * We need to check again after locking the * block group */ - if (!ext4_mb_good_group(ac, group, cr)) { + ret = ext4_mb_good_group(ac, group, cr); + if (ret <= 0) { ext4_unlock_group(sb, group); ext4_mb_unload_buddy(&e4b); + if (!first_err) + first_err = ret; continue; } @@ -2219,6 +2232,8 @@ repeat: } } out: + if (!err && ac->ac_status != AC_STATUS_FOUND && first_err) + err = first_err; return err; } |