[Qemu-devel] [PATCH 03/88] exec: file_ram_alloc(): print error when prealloc fails

[Michael Roth]

From: Luiz Capitulino <lcapitul...@redhat.com>

If memory allocation fails when using the -mem-prealloc command-line
option, QEMU exits without printing any error information to
the user:

 # qemu [...] -m 1G -mem-prealloc -mem-path /dev/hugepages
 # echo $?
 1

This commit adds an error message, so that we print instead:

 # qemu [...] -m 1G -mem-prealloc -mem-path /dev/hugepages
 qemu: unable to map backing store for hugepages: Cannot allocate memory

Signed-off-by: Luiz Capitulino <lcapitul...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
(cherry picked from commit e4d9df4fb16861f413374b69fcdb12c8c7a4a17e)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
 exec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/exec.c b/exec.c
index 307bc24..a7d7daa 100644
--- a/exec.c
+++ b/exec.c
@@ -1130,6 +1130,7 @@ static void *file_ram_alloc(RAMBlock *block,
 
 error:
     if (mem_prealloc) {
+        error_report("%s\n", error_get_pretty(*errp));
         exit(1);
     }
     return NULL;
-- 
1.9.1