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Ticket Resolution Summary Owner Reporter
#6470 invalid 3.1.6 unstable, going back to 3.0.12 Petr Stehlík
Description

Tried 3.1.6 for a while on an AMD64 linux host with SMP 32-bit Windows in a guest:

  1. on a stock 2.6.31 Karmic kernel it's about 10 times slower than on a custom 2.6.32 kernel (just like previous VirtualBox versions)
  2. got BSOD during Windows boot (twice from four trials) - attached logfile
  3. VirtualBox crashed completely during a performance test - attached logfile

as always since 3.1.0 release I am restoring a backup and going back to good old rock stable 3.0.12 release.

#17771 fixed 3.13 kernel compile bug U16_MAX and U32_MAX undeclared -> fixed after (not in) 5.2.12 gim
Description
VirtualBox/out/linux.amd64/release/obj/tstvboxvideo-src_mod/modesetting.c: In function ‘VBoxHGSMIGetScreenFlags’:
/VirtualBox/out/linux.amd64/release/obj/tstvboxvideo-src_mod/modesetting.c:353:32: error: ‘U16_MAX’ undeclared (first use in this function)
  if (RT_FAILURE(rc) || flags > U16_MAX)
...                                ^
VirtualBox/out/linux.amd64/release/obj/tstvboxvideo-src_mod/hgsmi_base.c: In function ‘hgsmi_query_conf’:
VirtualBox/out/linux.amd64/release/obj/tstvboxvideo-src_mod/hgsmi_base.c:163:13: error: ‘U32_MAX’ undeclared (first use in this function)
  p->value = U32_MAX;
             ^

https://elixir.bootlin.com/linux/v3.13.11/source/include/linux/kernel.h https://elixir.bootlin.com/linux/v3.14/source/include/linux/kernel.h

Kernel lower v3.14 doesn't contain defines:

#define U8_MAX		((u8)~0U)
#define S8_MAX		((s8)(U8_MAX>>1))
#define S8_MIN		((s8)(-S8_MAX - 1))
#define U16_MAX		((u16)~0U)
#define S16_MAX		((s16)(U16_MAX>>1))
#define S16_MIN		((s16)(-S16_MAX - 1))
#define U32_MAX		((u32)~0U)
#define S32_MAX		((s32)(U32_MAX>>1))
#define S32_MIN		((s32)(-S32_MAX - 1))
#define U64_MAX		((u64)~0ULL)
#define S64_MAX		((s64)(U64_MAX>>1))
#define S64_MIN		((s64)(-S64_MAX - 1))
#6716 fixed 3.2 Slow guests after update from 3.1.8 -> fixed in SVN (nested paging regression fixed in 3.2.2) PC Perfect
Description

After updating virtualbox 3.1.8 to 3.2 on an Ubuntu 10.04 64-bit host my XP/FLP guest runs very slow. I haven't tried any 3.2 beta.

Disabling "Enable Nested Paging" restored the speed.

Also reported on Mac hosts: http://forums.virtualbox.org/viewtopic.php?f=8&p=138101

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