diff options
| author | Juergen Gross <jgross@suse.com> | 2024-07-10 11:27:49 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2024-07-11 16:33:39 +0200 |
| commit | 942d917cb92af2277db9e3be0d62345d770d5996 (patch) | |
| tree | 04cb15cb7ef9ff8995b2833535b6f9d41be215ff /Documentation/admin-guide | |
| parent | fab451d1582cde6073c271f0520c2348a4f1398e (diff) | |
xen: make multicall debug boot time selectable
Today Xen multicall debugging needs to be enabled via modifying a
define in a source file for getting debug data of multicall errors
encountered by users.
Switch multicall debugging to depend on a boot parameter "xen_mc_debug"
instead, enabling affected users to boot with the new parameter set in
order to get better diagnostics.
With debugging enabled print the following information in case at least
one of the batched calls failed:
- all calls of the batch with operation, result and caller
- all parameters of each call
- all parameters stored in the multicall data for each call
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Message-ID: <20240710092749.13595-1-jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 27ec49af1bf2..b33d048e01d8 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -7427,6 +7427,12 @@ Crash from Xen panic notifier, without executing late panic() code such as dumping handler. + xen_mc_debug [X86,XEN,EARLY] + Enable multicall debugging when running as a Xen PV guest. + Enabling this feature will reduce performance a little + bit, so it should only be enabled for obtaining extended + debug data in case of multicall errors. + xen_msr_safe= [X86,XEN,EARLY] Format: <bool> Select whether to always use non-faulting (safe) MSR |