提交 bb8b20ed 编写于 作者: L Lukas Czerner 提交者: Theodore Ts'o

ext4: do not use yield()

Using yield() is strongly discouraged (see sched/core.c) especially
since we can just use cond_resched().

Replace all use of yield() with cond_resched().
Signed-off-by: NLukas Czerner <lczerner@redhat.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
上级 e3d85c36
......@@ -1352,7 +1352,7 @@ static int ext4_da_reserve_space(struct inode *inode, ext4_lblk_t lblock)
ei->i_da_metadata_calc_last_lblock = save_last_lblock;
spin_unlock(&ei->i_block_reservation_lock);
if (ext4_should_retry_alloc(inode->i_sb, &retries)) {
yield();
cond_resched();
goto repeat;
}
dquot_release_reservation_block(inode, EXT4_C2B(sbi, 1));
......
......@@ -3692,11 +3692,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
if (free < needed && busy) {
busy = 0;
ext4_unlock_group(sb, group);
/*
* Yield the CPU here so that we don't get soft lockup
* in non preempt case.
*/
yield();
cond_resched();
goto repeat;
}
......@@ -4246,7 +4242,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
ext4_claim_free_clusters(sbi, ar->len, ar->flags)) {
/* let others to free the space */
yield();
cond_resched();
ar->len = ar->len >> 1;
}
if (!ar->len) {
......
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