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| author | Igor Mammedov <imammedo@redhat.com> | 2021-01-11 15:33:32 -0500 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2021-07-06 18:05:16 -0400 |
| commit | cdcf766d0b0364165ba9e5ceacfdf37c8b1fe4ae (patch) | |
| tree | 27dae453b720de1bc58c6eb425f9efbf996f9b3e /util/mmap-alloc.c | |
| parent | 80cc1a0dd19cc414ddaa3f1b9b6ef91e3ebc12b2 (diff) | |
Deprecate pmem=on with non-DAX capable backend file
It is not safe to pretend that emulated NVDIMM supports
persistence while backend actually failed to enable it
and used non-persistent mapping as fall back.
Instead of falling-back, QEMU should be more strict and
error out with clear message that it's not supported.
So if user asks for persistence (pmem=on), they should
store backing file on NVDIMM.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210111203332.740815-1-imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'util/mmap-alloc.c')
| -rw-r--r-- | util/mmap-alloc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c index 838e286ce5..893d864354 100644 --- a/util/mmap-alloc.c +++ b/util/mmap-alloc.c @@ -225,6 +225,8 @@ static void *mmap_activate(void *ptr, size_t size, int fd, "crash.\n", file_name); g_free(proc_link); g_free(file_name); + warn_report("Using non DAX backing file with 'pmem=on' option" + " is deprecated"); } /* * If mmap failed with MAP_SHARED_VALIDATE | MAP_SYNC, we will try |