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Deal with transient EBUSY error return from vm_run() by retrying the operation.

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This commit is contained in:
Neel Natu 2012-10-12 18:49:07 +00:00
parent 75dd336603
commit 3019332f6d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/projects/bhyve/; revision=241490
1 changed files with 13 additions and 2 deletions
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15
usr.sbin/bhyve/fbsdrun.c
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@ -516,8 +516,19 @@ vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip)
while (1) {
error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]);
if (error != 0)
break;
if (error != 0) {
/*
* It is possible that 'vmmctl' or some other process
* has transitioned the vcpu to CANNOT_RUN state right
* before we tried to transition it to RUNNING.
*
* This is expected to be temporary so just retry.
*/
if (errno == EBUSY)
continue;
else
break;
}
prevcpu = vcpu;
rc = (*handler[vmexit[vcpu].exitcode])(ctx, &vmexit[vcpu],