[PATCH 2/2] fs: clarify rate limit suppressed buffer I/O errors
When quiet_error applies rate limiting to buffer_io_error calls, what the
they apply to is unclear because the name is so generic, particularly
if the messages are interleaved with others:
[ 1936.063572] quiet_error: 664293 callbacks suppressed
[ 1936.065297] Buffer I/O error on dev sdr, logical block 257429952, lost async
page write
[ 1936.067814] Buffer I/O error on dev sdr, logical block 257429953, lost async
page write
Also, the function uses printk_ratelimit(), although printk.h includes a
comment advising "Please don't use... Instead use printk_ratelimited()."
Change buffer_io_error to check the BH_Quiet bit itself, drop the
printk_ratelimit call, and print using printk_ratelimited.
This makes the messages look like:
[ 387.208839] buffer_io_error: 676394 callbacks suppressed
[ 387.210693] Buffer I/O error on dev sdr, logical block 211291776, lost async
page write
[ 387.213432] Buffer I/O error on dev sdr, logical block 211291777, lost async
page write
Signed-off-by: Robert Elliott
Reviewed-by: Webb Scales
---
fs/buffer.c | 23 +++
1 files changed, 7 insertions(+), 16 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index c6cb0ee..3710a68 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -128,19 +128,13 @@ __clear_page_buffers(struct page *page)
page_cache_release(page);
}
-
-static int quiet_error(struct buffer_head *bh)
-{
- if (!test_bit(BH_Quiet, >b_state) && printk_ratelimit())
- return 0;
- return 1;
-}
-
-
static void buffer_io_error(struct buffer_head *bh, char *msg)
{
char b[BDEVNAME_SIZE];
- printk(KERN_ERR "Buffer I/O error on dev %s, logical block %llu%s\n",
+
+ if (!test_bit(BH_Quiet, >b_state))
+ printk_ratelimited(KERN_ERR
+ "Buffer I/O error on dev %s, logical block %llu%s\n",
bdevname(bh->b_bdev, b),
(unsigned long long)bh->b_blocknr, msg);
}
@@ -180,8 +174,7 @@ void end_buffer_write_sync(struct buffer_head *bh, int
uptodate)
if (uptodate) {
set_buffer_uptodate(bh);
} else {
- if (!quiet_error(bh))
- buffer_io_error(bh, ", lost sync page write");
+ buffer_io_error(bh, ", lost sync page write");
set_buffer_write_io_error(bh);
clear_buffer_uptodate(bh);
}
@@ -298,8 +291,7 @@ static void end_buffer_async_read(struct buffer_head *bh,
int uptodate)
set_buffer_uptodate(bh);
} else {
clear_buffer_uptodate(bh);
- if (!quiet_error(bh))
- buffer_io_error(bh, ", async page read");
+ buffer_io_error(bh, ", async page read");
SetPageError(page);
}
@@ -358,8 +350,7 @@ void end_buffer_async_write(struct buffer_head *bh, int
uptodate)
if (uptodate) {
set_buffer_uptodate(bh);
} else {
- if (!quiet_error(bh))
- buffer_io_error(bh, ", lost async page write");
+ buffer_io_error(bh, ", lost async page write");
set_bit(AS_EIO, >mapping->flags);
set_buffer_write_io_error(bh);
clear_buffer_uptodate(bh);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[PATCH 2/2] fs: clarify rate limit suppressed buffer I/O errors
When quiet_error applies rate limiting to buffer_io_error calls, what the
they apply to is unclear because the name is so generic, particularly
if the messages are interleaved with others:
[ 1936.063572] quiet_error: 664293 callbacks suppressed
[ 1936.065297] Buffer I/O error on dev sdr, logical block 257429952, lost async
page write
[ 1936.067814] Buffer I/O error on dev sdr, logical block 257429953, lost async
page write
Also, the function uses printk_ratelimit(), although printk.h includes a
comment advising Please don't use... Instead use printk_ratelimited().
Change buffer_io_error to check the BH_Quiet bit itself, drop the
printk_ratelimit call, and print using printk_ratelimited.
This makes the messages look like:
[ 387.208839] buffer_io_error: 676394 callbacks suppressed
[ 387.210693] Buffer I/O error on dev sdr, logical block 211291776, lost async
page write
[ 387.213432] Buffer I/O error on dev sdr, logical block 211291777, lost async
page write
Signed-off-by: Robert Elliott elli...@hp.com
Reviewed-by: Webb Scales web...@hp.com
---
fs/buffer.c | 23 +++
1 files changed, 7 insertions(+), 16 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index c6cb0ee..3710a68 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -128,19 +128,13 @@ __clear_page_buffers(struct page *page)
page_cache_release(page);
}
-
-static int quiet_error(struct buffer_head *bh)
-{
- if (!test_bit(BH_Quiet, bh-b_state) printk_ratelimit())
- return 0;
- return 1;
-}
-
-
static void buffer_io_error(struct buffer_head *bh, char *msg)
{
char b[BDEVNAME_SIZE];
- printk(KERN_ERR Buffer I/O error on dev %s, logical block %llu%s\n,
+
+ if (!test_bit(BH_Quiet, bh-b_state))
+ printk_ratelimited(KERN_ERR
+ Buffer I/O error on dev %s, logical block %llu%s\n,
bdevname(bh-b_bdev, b),
(unsigned long long)bh-b_blocknr, msg);
}
@@ -180,8 +174,7 @@ void end_buffer_write_sync(struct buffer_head *bh, int
uptodate)
if (uptodate) {
set_buffer_uptodate(bh);
} else {
- if (!quiet_error(bh))
- buffer_io_error(bh, , lost sync page write);
+ buffer_io_error(bh, , lost sync page write);
set_buffer_write_io_error(bh);
clear_buffer_uptodate(bh);
}
@@ -298,8 +291,7 @@ static void end_buffer_async_read(struct buffer_head *bh,
int uptodate)
set_buffer_uptodate(bh);
} else {
clear_buffer_uptodate(bh);
- if (!quiet_error(bh))
- buffer_io_error(bh, , async page read);
+ buffer_io_error(bh, , async page read);
SetPageError(page);
}
@@ -358,8 +350,7 @@ void end_buffer_async_write(struct buffer_head *bh, int
uptodate)
if (uptodate) {
set_buffer_uptodate(bh);
} else {
- if (!quiet_error(bh))
- buffer_io_error(bh, , lost async page write);
+ buffer_io_error(bh, , lost async page write);
set_bit(AS_EIO, page-mapping-flags);
set_buffer_write_io_error(bh);
clear_buffer_uptodate(bh);
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
