BMC/Intel-BMC/linux.git/arch/um/kernel/tlb.c, branch dev-5.2

um: Optimize Flush TLB for force/fork case

2018-12-27T21:48:34+00:00

When UML handles a fork the page tables need to be brought up to date. That was done using brute force - full tlb flush. This is actually unnecessary, because the mapped-in mappings are all correct and the only mappings which need to be updated after a flush are any unmaps (so that paging works) as well as any pending protection changes. This optimization squeezes out up to 3% from a full kernel rebuild time under memory pressure. Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: Skip TLB flushing where not needed

2018-12-27T21:48:34+00:00

Skip TLB flushing for all cases where it is not needed, not just flush_tlb_mm_range Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: Optimize TLB operations v2

2018-12-27T21:48:34+00:00

Make the code to merge mmap/munmap/mprotect operations in tlb.c common for userspace and kernel. Kernel tlb operations can now be merged as well. Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:29+00:00

We are going to split out of , which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder file that just maps to to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

um: Report host OOM more nicely

2015-11-06T21:49:12+00:00

If UML runs on the host side out of memory, report this condition more nicely. Signed-off-by: Richard Weinberger

um: Fix do_signal() prototype

2015-07-07T08:58:54+00:00

Once x86 exports its do_signal(), the prototypes will clash. Fix the clash and also improve the code a bit: remove the unnecessary kern_do_signal() indirection. This allows interrupt_end() to share the 'regs' parameter calculation. Also remove the unused return code to match x86. Minimally build and boot tested. Signed-off-by: Ingo Molnar Signed-off-by: Andy Lutomirski Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: Denys Vlasenko Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Richard Weinberger Cc: Rik van Riel Cc: Thomas Gleixner Cc: paulmck@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/67c57eac09a589bac3c6c5ff22f9623ec55a184a.1435952415.git.luto@kernel.org Signed-off-by: Ingo Molnar

um: Fix hung task in fix_range_common()

2014-07-20T11:16:20+00:00

If do_ops() fails we have to release current->mm->mmap_sem otherwise the failing task will never terminate. Reported-by: Toralf Förster Signed-off-by: Richard Weinberger

um: Ensure that a stub page cannot get unmapped

2014-07-20T11:09:15+00:00

Trinity discovered an execution path such that a task can unmap his stub page. Reported-by: Toralf Förster Signed-off-by: Richard Weinberger

um: get rid of pointless include "..." where include <...> will do

2012-10-09T20:28:45+00:00

Signed-off-by: Al Viro Signed-off-by: Richard Weinberger

um: Add BUG() to do_ops()'s error path

2012-05-21T19:09:33+00:00

In case we encounter a bad operation in do_ops() something is really broken and it's better to BUG(). Signed-off-by: Richard Weinberger