Skip to content

cloud-kernel
cloud-kernel

openanolis / cloud-kernel
1 年多 前同步成功

通知 161
Star 36
Fork 7
cloud-kernel
cloud-kernel
切换分支/标签
  1. 18 9月, 2006 1 次提交
  3. 15 9月, 2006 1 次提交
  5. 14 9月, 2006 3 次提交
  7. 10 9月, 2006 2 次提交
  9. 07 9月, 2006 4 次提交
  11. 03 9月, 2006 1 次提交
    • G
      [ARM] 3762/1: Fix ptrace cache coherency bug for ARM1136 VIPT nonaliasing Harvard caches · a188ad2b
      由 George G. Davis 提交于 
      Patch from George G. Davis

Resolve ARM1136 VIPT non-aliasing cache coherency issues observed when
using ptrace to set breakpoints and cleanup copy_{to,from}_user_page()
while we're here as requested by Russell King because "it's also far
too heavy on non-v6 CPUs".

NOTES:

1. Only access_process_vm() calls copy_{to,from}_user_page().
2. access_process_vm() calls get_user_pages() to pin down the "page".
3. get_user_pages() calls flush_dcache_page(page) which ensures cache
   coherency between kernel and userspace mappings of "page".  However
   flush_dcache_page(page) may not invalidate I-Cache over this range
   for all cases, specifically, I-Cache is not invalidated for the VIPT
   non-aliasing case.  So memory is consistent between kernel and user
   space mappings of "page" but I-Cache may still be hot over this
   range.  IOW, we don't have to worry about flush_cache_page() before
   memcpy().
4. Now, for the copy_to_user_page() case, after memcpy(), we must flush
   the caches so memory is consistent with kernel cache entries and
   invalidate the I-Cache if this mm region is executable.  We don't
   need to do anything after memcpy() for the copy_from_user_page()
   case since kernel cache entries will be invalidated via the same
   process above if we access "page" again.  The flush_ptrace_access()
   function (borrowed from SPARC64 implementation) is added to handle
   cache flushing after memcpy() for the copy_to_user_page() case.
Signed-off-by: NGeorge G. Davis <gdavis@mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      a188ad2b
  13. 31 8月, 2006 2 次提交
  15. 30 8月, 2006 1 次提交
  17. 28 8月, 2006 4 次提交
  19. 27 8月, 2006 5 次提交
  21. 19 8月, 2006 1 次提交
  23. 18 8月, 2006 4 次提交
  25. 15 8月, 2006 1 次提交
    • H
      [PATCH] Change panic_on_oops message to "Fatal exception" · 012c437d
      由 Horms 提交于 
      Previously the message was "Fatal exception: panic_on_oops", as introduced
in a recent patch whith removed a somewhat dangerous call to ssleep() in
the panic_on_oops path.  However, Paul Mackerras suggested that this was
somewhat confusing, leadind people to believe that it was panic_on_oops
that was the root cause of the fatal exception.  On his suggestion, this
patch changes the message to simply "Fatal exception".  A suitable oops
message should already have been displayed.
Signed-off-by: NSimon Horman <horms@verge.net.au>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      012c437d
  27. 13 8月, 2006 1 次提交
  29. 06 8月, 2006 3 次提交
  31. 02 8月, 2006 1 次提交
  33. 01 8月, 2006 1 次提交
    • H
      [PATCH] panic_on_oops: remove ssleep() · cea6a4ba
      由 Horms 提交于 
      This patch is part of an effort to unify the panic_on_oops behaviour across
all architectures that implement it.

It was pointed out to me by Andi Kleen that if an oops has occured in
interrupt context, then calling sleep() in the oops path will only cause a
panic, and that it would be really better for it not to be in the path at
all.

This patch removes the ssleep() call and reworks the console message
accordinly.  I have a slght concern that the resulting console message is
too long, feedback welcome.

For powerpc it also unifies the 32bit and 64bit behaviour.

Fror x86_64, this patch only updates the console message, as ssleep() is
already not present.
Signed-off-by: NHorms <horms@verge.net.au>
Acked-by: NPaul Mackerras <paulus@samba.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      cea6a4ba
  35. 29 7月, 2006 3 次提交
  37. 27 7月, 2006 1 次提交