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| author | Daniel Drake <dsd@laptop.org> | 2010-10-21 01:00:48 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 19:20:11 +0200 |
| commit | cd3ecad19aea8debae9a48b53de2ec7a571f24e9 (patch) | |
| tree | fbdb69e372b60cd01daca0c9ea3c8b5ebebb4d00 /Documentation/filesystems | |
| parent | serial: bfin_sport_uart: speed up sport RX sample rate to be 3% faster (diff) | |
| download | linux-cd3ecad19aea8debae9a48b53de2ec7a571f24e9.tar.xz linux-cd3ecad19aea8debae9a48b53de2ec7a571f24e9.zip | |
serial8250: ratelimit "too much work" error
Running a serial console, if too many kernel messages are generated within
a short time causing a lot of serial I/O, the 8250 driver will generate
another kernel message reporting this, which just adds to the I/O. It has
a cascading effect and quickly results the system being brought to its knees
by a flood of "too much work" messages.
Ratelimit the error message to avoid this.
[akpm@linux-foundation.org: use the superior printk_ratelimited()]
[akpm@linux-foundation.org: printk_ratelimited() needs ratelimit.h]
Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/filesystems')
0 files changed, 0 insertions, 0 deletions