Re: [patch 47/60] x86/ldt: Map LDT entries into fixmap

2017-12-04 Thread Thomas Gleixner
On Mon, 4 Dec 2017, Andy Lutomirski wrote: > On Mon, Dec 4, 2017 at 6:07 AM, Thomas Gleixner wrote: > > From: Thomas Gleixner > > > > LDT is not really commonly used on 64bit so the overhead of populating the > > fixmap entries on context switch for the rare LDT syscall users is a > > reasonable

Re: [patch 47/60] x86/ldt: Map LDT entries into fixmap

2017-12-04 Thread Andy Lutomirski
On Mon, Dec 4, 2017 at 6:07 AM, Thomas Gleixner wrote: > From: Thomas Gleixner > > LDT is not really commonly used on 64bit so the overhead of populating the > fixmap entries on context switch for the rare LDT syscall users is a > reasonable trade off vs. having extra dynamically managed mapping

[patch 47/60] x86/ldt: Map LDT entries into fixmap

2017-12-04 Thread Thomas Gleixner
From: Thomas Gleixner LDT is not really commonly used on 64bit so the overhead of populating the fixmap entries on context switch for the rare LDT syscall users is a reasonable trade off vs. having extra dynamically managed mapping space per process. Signed-off-by: Thomas Gleixner --- arch/x86