From: Khazhismel Kumykov <khazhy@google.com>
To: tytso@mit.edu, adilger.kernel@dilger.ca
Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
Khazhismel Kumykov <khazhy@google.com>
Subject: [PATCH] ext4: add cond_resched() to ext4_mb_init_backend()
Date: Mon, 15 Apr 2019 19:59:34 -0700 [thread overview]
Message-ID: <20190416025934.115252-1-khazhy@google.com> (raw)
on non-preempt kernels for filesystems with large number of groups we
may take a long time (>50 ticks) initializing all the groups.
Signed-off-by: Khazhismel Kumykov <khazhy@google.com>
---
fs/ext4/mballoc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8ef5f12bbee2..c89f497ccf50 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2490,6 +2490,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
sbi->s_buddy_cache->i_ino = EXT4_BAD_INO;
EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
for (i = 0; i < ngroups; i++) {
+ cond_resched();
desc = ext4_get_group_desc(sb, i, NULL);
if (desc == NULL) {
ext4_msg(sb, KERN_ERR, "can't read descriptor %u", i);
--
2.21.0.392.gf8f6787159e-goog
next reply other threads:[~2019-04-16 3:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-16 2:59 Khazhismel Kumykov [this message]
2019-04-18 11:53 ` [PATCH] ext4: add cond_resched() to ext4_mb_init_backend() Jan Kara
2019-04-18 20:05 ` Khazhismel Kumykov
2019-04-23 21:13 ` [PATCH v2] ext4: cond_resched in work-heavy group loops Khazhismel Kumykov
2019-04-24 6:21 ` Andreas Dilger
2019-04-25 16:58 ` Theodore Ts'o
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