Subject: + blockloop-ratelimit-error-messages.patch added to -mm tree
To: bitbucket@xxxxxxxxx,axboe@xxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 01 Apr 2014 14:56:47 -0700
The patch titled
Subject: drivers/block/loop.c: ratelimit error messages
has been added to the -mm tree. Its filename is
blockloop-ratelimit-error-messages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/blockloop-ratelimit-error-messages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/blockloop-ratelimit-error-messages.patch
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------------------------------------------------------
From: Mike Galbraith <bitbucket@xxxxxxxxx>
Subject: drivers/block/loop.c: ratelimit error messages
Metric tons of high speed spew is not helpful when things go pear shaped.
systemd lost its mind, forgot how to stop services it insists on being
sole manager of, massive printk() flood ensued, box eventually died.
[16206.684000] loop: Write error at byte offset 11412291584, length 4096.
[16206.684000] systemd-journald[1758]: /dev/kmsg buffer overrun, some messages lost.
[16206.684000] loop: Write error at byte offset 13155434496, length 4096.
[16206.684000] loop: Write error at byte offset 13155438592, length 4096.
[16206.684000] loop: Write error at byte offset 13155442688, length 4096.
[16206.684000] loop: Write error at byte offset 13960736768, length 4096.
[16206.684000] loop: Write error at byte offset 14229172224, length 4096.
[16206.684000] systemd-journald[1758]: /dev/kmsg buffer overrun, some messages lost.
[16206.684000] loop: Write error at byte offset 14766043136, length 4096.
[16206.684000] loop: Write error at byte offset 15034478592, length 4096.
[16206.684000] systemd-journald[1758]: /dev/kmsg buffer overrun, some messages lost.
Signed-off-by: Mike Galbraith <bitbucket@xxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/loop.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff -puN drivers/block/loop.c~blockloop-ratelimit-error-messages drivers/block/loop.c
--- a/drivers/block/loop.c~blockloop-ratelimit-error-messages
+++ a/drivers/block/loop.c
@@ -237,7 +237,7 @@ static int __do_lo_send_write(struct fil
file_end_write(file);
if (likely(bw == len))
return 0;
- printk(KERN_ERR "loop: Write error at byte offset %llu, length %i.\n",
+ printk_ratelimited(KERN_ERR "loop: Write error at byte offset %llu, length %i.\n",
(unsigned long long)pos, len);
if (bw >= 0)
bw = -EIO;
@@ -277,7 +277,7 @@ static int do_lo_send_write(struct loop_
return __do_lo_send_write(lo->lo_backing_file,
page_address(page), bvec->bv_len,
pos);
- printk(KERN_ERR "loop: Transfer error at byte offset %llu, "
+ printk_ratelimited(KERN_ERR "loop: Transfer error at byte offset %llu, "
"length %i.\n", (unsigned long long)pos, bvec->bv_len);
if (ret > 0)
ret = -EIO;
@@ -316,7 +316,7 @@ static int lo_send(struct loop_device *l
out:
return ret;
fail:
- printk(KERN_ERR "loop: Failed to allocate temporary page for write.\n");
+ printk_ratelimited(KERN_ERR "loop: Failed to allocate temporary page for write.\n");
ret = -ENOMEM;
goto out;
}
@@ -345,7 +345,7 @@ lo_splice_actor(struct pipe_inode_info *
size = p->bsize;
if (lo_do_transfer(lo, READ, page, buf->offset, p->page, p->offset, size, IV)) {
- printk(KERN_ERR "loop: transfer error block %ld\n",
+ printk_ratelimited(KERN_ERR "loop: transfer error block %ld\n",
page->index);
size = -EINVAL;
}
_
Patches currently in -mm which might be from bitbucket@xxxxxxxxx are
origin.patch
blockloop-ratelimit-error-messages.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-fix.patch
linux-next.patch
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