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| author | Nico Boehr <nrb@linux.ibm.com> | 2023-10-09 11:32:53 +0200 |
|---|---|---|
| committer | Janosch Frank <frankja@linux.ibm.com> | 2023-10-16 14:54:29 +0200 |
| commit | 70fea30195168fd84e7076720c984f0ac1af5b09 (patch) | |
| tree | c237c00275184307d65774767dc2ff8fc927ea02 /arch/s390/kvm/kvm-s390.c | |
| parent | KVM: s390: add stat counter for shadow gmap events (diff) | |
| download | linux-70fea30195168fd84e7076720c984f0ac1af5b09.tar.xz linux-70fea30195168fd84e7076720c984f0ac1af5b09.zip | |
KVM: s390: add tracepoint in gmap notifier
The gmap notifier is called for changes in table entries with the
notifier bit set. To diagnose performance issues, it can be useful to
see what causes certain changes in the gmap.
Hence, add a tracepoint in the gmap notifier.
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20231009093304.2555344-3-nrb@linux.ibm.com
Message-Id: <20231009093304.2555344-3-nrb@linux.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index b42493110d76..11676b81e6bf 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -4060,6 +4060,8 @@ static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, unsigned long prefix; unsigned long i; + trace_kvm_s390_gmap_notifier(start, end, gmap_is_shadow(gmap)); + if (gmap_is_shadow(gmap)) return; if (start >= 1UL << 31) |