Date: Mon, 3 Mar 2008 11:48:50 -0800 (PST) From: fchang@cs.ubc.ca To: Roman Divacky <rdivacky@FreeBSD.org> Cc: freebsd-emulation@FreeBSD.org Subject: Re: patch for /usr/ports/emulators/vmware3 Message-ID: <Pine.GSO.4.60.0803031146310.29005@cascade.cs.ubc.ca> In-Reply-To: <20080303184435.GA73429@freebsd.org> References: <Pine.GSO.4.60.0803030908590.24210@cascade.cs.ubc.ca> <20080303184435.GA73429@freebsd.org>
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On Mon, 3 Mar 2008, Roman Divacky wrote:
> I dont think this is correct. you are modifying
> the filedescriptor while holding "shared lock".
> unless I am wrong it should be changed to FILEDESC_XLOCK/XUNLOCK
Yes I think you're right.
I just recompiled vmware3 with your correction of
FILEDESC_XLOCK/FILEDESC_XUNLOCK, and things still work fine.
So I'm happy.
Here is the revised patch:
--- work/vmware-distrib/vmmon-only/freebsd/driver.c.old 2008-03-03 17:03:25.000000000 +0000
+++ work/vmware-distrib/vmmon-only/freebsd/driver.c 2008-03-03 17:04:13.000000000 +0000
@@ -397,12 +397,12 @@
if ((error = falloc(td, &fp, &fd)) != 0)
return error;
- FILEDESC_LOCK(p->p_fd);
+ FILEDESC_XLOCK(p->p_fd);
fp->f_data = data;
fp->f_flag = flags & FMASK;
fp->f_ops = &vmmon_fileops;
fp->f_type = DTYPE_SOCKET;
- FILEDESC_UNLOCK(p->p_fd);
+ FILEDESC_XUNLOCK(p->p_fd);
#if __FreeBSD_version >= 501111
/* falloc now returns TWO references to the file, not one. */
@@ -1309,6 +1309,19 @@
return FALSE;
}
+static vm_paddr_t
+get_avail_end(void)
+{
+ vm_paddr_t avail_end;
+ int i;
+ avail_end = phys_avail[1];
+ for (i = 0; phys_avail[i + 1]; i += 2) {
+ if (phys_avail[i + 1] > avail_end)
+ avail_end = phys_avail[i + 1];
+ }
+ return avail_end;
+}
+
/*
* Allocate and lock numPages of memory physically continguous addresses
* below 4GB.
@@ -1341,6 +1354,7 @@
VMDEBUG("vmmon_alloc_low_pages: malloc MemRange failed\n");
return ENOMEM;
}
+ vm_paddr_t avail_end = get_avail_end();
if (avail_end > ISA_DMA_BOUNCE_THRESHOLD)
high = trunc_page(ISA_DMA_BOUNCE_THRESHOLD);
else
--- work/vmware-distrib/vmmon-only/include/vm_asm.h.old 2008-03-03 17:03:22.000000000 +0000
+++ work/vmware-distrib/vmmon-only/include/vm_asm.h 2008-03-03 17:07:21.000000000 +0000
@@ -1020,6 +1020,7 @@
*-----------------------------------------------------------------------------
*/
+#if 0
static INLINE void
Div643264(uint64 dividend,
uint32 divisor,
@@ -1047,6 +1048,7 @@
*quotient = (uint64)hQuotient << 32 | lQuotient;
}
#endif
+#endif
#endif /* VM_ASM_H */
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