Messages in this thread | | | Date | Wed, 3 Nov 2010 10:47:11 -0200 | From | Marcelo Tosatti <> | Subject | Re: [PATCH] KVM x86: remove memset, use vzalloc and don't assign the same value to a variable twice |
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On Tue, Nov 02, 2010 at 05:11:19AM +0100, Jesper Juhl wrote: > On Tue, 2 Nov 2010, Takuya Yoshikawa wrote: > > > Hi Jesper, (dropped some addresses from Cc) > > > > > > Jesper Juhl wrote: > > > There's definately a positive size impact for the generated object code > > > and we save having to do the call to memset() and the cost of a vzalloc() > > > call looks more or less the same as a call to vmalloc() to me. > > > > > > This patch is not based on kvm.git, I guess. > > > > > > > Nope. It was generated against mainline git as of a couple of days ago. I > > > can generate a version against kvm.git if you prefer. > > > > Sorry, I should have said more clearly. > > > > kvm_vm_ioctl_get_dirty_log() has been changed since latest mainline kernel was released. > > Furthermore, vmalloc() in it is to be removed soon, currently in kvm's next. > > > > I have checked all vmalloc() + memset() in kvm, and there are three remaining. > > See the patch below. > > - I have tested on x86. > > - I can test ppc later if needed, but this is so trivial that Alex will see > > no problem about this, probably. > > > > So please write your Signed-off-by and ask Avi and Marcelo to apply. > > > > Thanks, > > Takuya > > > > === > > Subject: [PATCH] KVM: replace vmalloc and memset with vzalloc > > > > Let's use newly introduced vzalloc(). > > > > Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> > > Signed-off-by: Jesper-juhl <jj@chaosbits.net>
Applied, thanks.
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