The commit is pushed to "branch-rh7-3.10.0-123.1.2-ovz" and will appear at
https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-123.1.2.vz7.5.1
------>
commit b6eb7575242d5e266d231ed53a4f7e03e47b2a68
Author: Andrey Smetanin <asmeta...@virtuozzo.com>
Date: Tue May 19 08:27:10 2015 +0400
ploop: warning on "disk full" condition
People complain that it's not always obvious why an app in CT gets
-ENOSPC while there remains some space on host filesystem.
The patch adds time ratelimited printk about "disk full" condition.
Maximal rate is 1 per hour.
https://bugzilla.openvz.org/show_bug.cgi?id=3045
Signed-off-by: Maxim Patlasov <mpatla...@parallels.com>
---
drivers/block/ploop/dev.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/block/ploop/dev.c b/drivers/block/ploop/dev.c
index 9aaab4a..ab99724 100644
--- a/drivers/block/ploop/dev.c
+++ b/drivers/block/ploop/dev.c
@@ -3533,8 +3533,18 @@ static int ploop_bd_full(struct backing_dev_info *bdi,
long long nr, int root)
current->journal_info = NULL;
ret = sb->s_op->statfs(F_DENTRY(file), &buf);
- if (ret || buf.f_bfree * buf.f_bsize < reserved + nr)
+ if (ret || buf.f_bfree * buf.f_bsize < reserved + nr) {
+ static unsigned long full_warn_time;
+
+ if (printk_timed_ratelimit(&full_warn_time, 60*60*HZ))
+ printk(KERN_WARNING
+ "ploop%d: host disk is almost full "
+ "(%llu < %llu); CT sees -ENOSPC !\n",
+ plo->index, buf.f_bfree * buf.f_bsize,
+ reserved + nr);
+
rc = 1;
+ }
fput(file);
current->journal_info = jctx;
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