diff options
| author | Joseph Salisbury <joseph.salisbury@microsoft.com> | 2020-06-27 00:28:17 +0200 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2020-06-29 12:30:35 +0200 |
| commit | 77b48bea2fee47c15a835f6725dd8df0bc38375a (patch) | |
| tree | dc48eb67fb62b3c55533b0ef5b0e6b98928b934a /drivers/hv | |
| parent | Linux 5.8-rc3 (diff) | |
| download | linux-77b48bea2fee47c15a835f6725dd8df0bc38375a.tar.xz linux-77b48bea2fee47c15a835f6725dd8df0bc38375a.zip | |
Drivers: hv: Change flag to write log level in panic msg to false
When the kernel panics, one page of kmsg data may be collected and sent to
Hyper-V to aid in diagnosing the failure. The collected kmsg data typically
contains 50 to 100 lines, each of which has a log level prefix that isn't
very useful from a diagnostic standpoint. So tell kmsg_dump_get_buffer()
to not include the log level, enabling more information that *is* useful to
fit in the page.
Requesting in stable kernels, since many kernels running in production are
stable releases.
Cc: stable@vger.kernel.org
Signed-off-by: Joseph Salisbury <joseph.salisbury@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1593210497-114310-1-git-send-email-joseph.salisbury@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 9147ee9d5f7d..d69f4efa3719 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -1368,7 +1368,7 @@ static void hv_kmsg_dump(struct kmsg_dumper *dumper, * Write dump contents to the page. No need to synchronize; panic should * be single-threaded. */ - kmsg_dump_get_buffer(dumper, true, hv_panic_page, HV_HYP_PAGE_SIZE, + kmsg_dump_get_buffer(dumper, false, hv_panic_page, HV_HYP_PAGE_SIZE, &bytes_written); if (bytes_written) hyperv_report_panic_msg(panic_pa, bytes_written); |