linux

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Ingo Molnar 2aba73a614 This is hopefully the last vdso fix for 3.19. It should be very safe (it just adds a volatile). I don't think it fixes an actual bug (the __getcpu calls in the pvclock code may not have been needed in the first place), but discussion on that point is ongoing. It also fixes a big performance issue in 3.18 and earlier in which the lsl instructions in vclock_gettime got hoisted so far up the function that they happened even when the function they were in was never called. n 3.19, the performance issue seems to be gone due to the whims of my compiler and some interaction with a branch that's now gone. I'll hopefully have a much bigger overhaul of the pvclock code for 3.20, but it needs careful review. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJUmduGAAoJEK9N98ZeDfrk874H/RkkP+y6/DmdKVR1dTOUQW4u f1wPU0/sc5xywGjNcfR3XwUuyBJyd3s81WVaE5XXHfCHnbjG2Z4CNTqga27hL1D0 io01Q2s3dh1Y5c0cccVmJmyw//YVzMUOzGTNM9R0NKQNXmYUz6jgQaqk+wWORdD6 JXCU3/LI5VT0fjNPLj1M9l59eC2Qg/V4GqY2xRJ1AfbwkX1CFZTcWUPb+4FScVYv 9gds/vOoFg54MypVJD4SeIC9I8U0qcim9gV7gGFdzyDNCXS5J4P+02sEOFNu8oYy HVK1B0LXhswT08Ho1yRxXUhFxpqEGeGJvTlDTvwy+r/yuKE2AVBtlhLQBqMPhnY= =u3d2 -----END PGP SIGNATURE----- Merge tag 'pr-20141223-x86-vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux into x86/urgent Pull VDSO fix from Andy Lutomirski: "This is hopefully the last vdso fix for 3.19. It should be very safe (it just adds a volatile). I don't think it fixes an actual bug (the __getcpu calls in the pvclock code may not have been needed in the first place), but discussion on that point is ongoing. It also fixes a big performance issue in 3.18 and earlier in which the lsl instructions in vclock_gettime got hoisted so far up the function that they happened even when the function they were in was never called. n 3.19, the performance issue seems to be gone due to the whims of my compiler and some interaction with a branch that's now gone. I'll hopefully have a much bigger overhaul of the pvclock code for 3.20, but it needs careful review." Signed-off-by: Ingo Molnar <mingo@kernel.org>	2015-01-01 22:21:22 +01:00
..
asm	This is hopefully the last vdso fix for 3.19. It should be very	2015-01-01 22:21:22 +01:00
uapi/asm	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-12-19 13:18:31 -08:00

Ingo Molnar 2aba73a614 This is hopefully the last vdso fix for 3.19. It should be very

safe (it just adds a volatile).
 
 I don't think it fixes an actual bug (the __getcpu calls in the
 pvclock code may not have been needed in the first place), but
 discussion on that point is ongoing.
 
 It also fixes a big performance issue in 3.18 and earlier in which
 the lsl instructions in vclock_gettime got hoisted so far up the
 function that they happened even when the function they were in was
 never called.  n 3.19, the performance issue seems to be gone due to
 the whims of my compiler and some interaction with a branch that's
 now gone.
 
 I'll hopefully have a much bigger overhaul of the pvclock code
 for 3.20, but it needs careful review.
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 Version: GnuPG v1
 
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Merge tag 'pr-20141223-x86-vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux into x86/urgent

Pull VDSO fix from Andy Lutomirski:

 "This is hopefully the last vdso fix for 3.19.  It should be very
  safe (it just adds a volatile).

  I don't think it fixes an actual bug (the __getcpu calls in the
  pvclock code may not have been needed in the first place), but
  discussion on that point is ongoing.

  It also fixes a big performance issue in 3.18 and earlier in which
  the lsl instructions in vclock_gettime got hoisted so far up the
  function that they happened even when the function they were in was
  never called.  n 3.19, the performance issue seems to be gone due to
  the whims of my compiler and some interaction with a branch that's
  now gone.

  I'll hopefully have a much bigger overhaul of the pvclock code
  for 3.20, but it needs careful review."

Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-01-01 22:21:22 +01:00

asm

This is hopefully the last vdso fix for 3.19. It should be very

2015-01-01 22:21:22 +01:00

uapi/asm

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2014-12-19 13:18:31 -08:00