kernel/drivers/misc/sgi-gru, branch linux-4.16.y

mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks

2018-02-01T01:18:38Z

Commit 4d4bbd8526a8 ("mm, oom_reaper: skip mm structs with mmu notifiers") prevented the oom reaper from unmapping private anonymous memory with the oom reaper when the oom victim mm had mmu notifiers registered. The rationale is that doing mmu_notifier_invalidate_range_{start,end}() around the unmap_page_range(), which is needed, can block and the oom killer will stall forever waiting for the victim to exit, which may not be possible without reaping. That concern is real, but only true for mmu notifiers that have blockable invalidate_range_{start,end}() callbacks. This patch adds a "flags" field to mmu notifier ops that can set a bit to indicate that these callbacks do not block. The implementation is steered toward an expensive slowpath, such as after the oom reaper has grabbed mm->mmap_sem of a still alive oom victim. [rientjes@google.com: mmu_notifier_invalidate_range_end() can also call the invalidate_range() must not block, fix comment] Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1801091339570.240101@chino.kir.corp.google.com [akpm@linux-foundation.org: make mm_has_blockable_invalidate_notifiers() return bool, use rwsem_is_locked()] Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1712141329500.74052@chino.kir.corp.google.com Signed-off-by: David Rientjes Acked-by: Michal Hocko Acked-by: Paolo Bonzini Acked-by: Christian König Acked-by: Dimitri Sivanich Cc: Andrea Arcangeli Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Oded Gabbay Cc: Alex Deucher Cc: David Airlie Cc: Joerg Roedel Cc: Doug Ledford Cc: Jani Nikula Cc: Mike Marciniszyn Cc: Sean Hefty Cc: Boris Ostrovsky Cc: Jérôme Glisse Cc: Radim Krčmář Signed-off-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

sgi-gru: update to new mmu_notifier semantic

2017-08-31T23:13:00Z

Calls to mmu_notifier_invalidate_page() were replaced by calls to mmu_notifier_invalidate_range() and are now bracketed by calls to mmu_notifier_invalidate_range_start()/end() Remove now useless invalidate_page callback. Signed-off-by: Jérôme Glisse Cc: Dimitri Sivanich Cc: Jack Steiner Cc: Kirill A. Shutemov Cc: Andrew Morton Cc: Andrea Arcangeli Signed-off-by: Linus Torvalds

mm: convert generic code to 5-level paging

2017-03-09T19:48:47Z

Convert all non-architecture-specific code to 5-level paging. It's mostly mechanical adding handling one more page table level in places where we deal with pud_t. Signed-off-by: Kirill A. Shutemov Acked-by: Michal Hocko Signed-off-by: Linus Torvalds

mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmf

2017-02-25T01:46:54Z

->fault(), ->page_mkwrite(), and ->pfn_mkwrite() calls do not need to take a vma and vmf parameter when the vma already resides in vmf. Remove the vma parameter to simplify things. [arnd@arndb.de: fix ARM build] Link: http://lkml.kernel.org/r/20170125223558.1451224-1-arnd@arndb.de Link: http://lkml.kernel.org/r/148521301778.19116.10840599906674778980.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dave Jiang Signed-off-by: Arnd Bergmann Reviewed-by: Ross Zwisler Cc: Theodore Ts'o Cc: Darrick J. Wong Cc: Matthew Wilcox Cc: Dave Hansen Cc: Christoph Hellwig Cc: Jan Kara Cc: Dan Williams Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: use vmf->address instead of of vmf->virtual_address

2016-12-15T00:04:09Z

Every single user of vmf->virtual_address typed that entry to unsigned long before doing anything with it so the type of virtual_address does not really provide us any additional safety. Just use masked vmf->address which already has the appropriate type. Link: http://lkml.kernel.org/r/1479460644-25076-3-git-send-email-jack@suse.cz Signed-off-by: Jan Kara Acked-by: Kirill A. Shutemov Cc: Dan Williams Cc: Ross Zwisler Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

drivers/misc/sgi-gru/grumain.c: remove bogus 0x prefix from printk

2016-10-28T01:43:43Z

Would like to have this be a decimal number. Link: http://lkml.kernel.org/r/20161026134746.GA30169@sgi.com Signed-off-by: Dimitri Sivanich Reported-by: Uwe Kleine-König Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: replace get_user_pages() write/force parameters with gup_flags

2016-10-19T15:11:43Z

This removes the 'write' and 'force' from get_user_pages() and replaces them with 'gup_flags' to make the use of FOLL_FORCE explicit in callers as use of this flag can result in surprising behaviour (and hence bugs) within the mm subsystem. Signed-off-by: Lorenzo Stoakes Acked-by: Christian König Acked-by: Jesper Nilsson Acked-by: Michal Hocko Reviewed-by: Jan Kara Signed-off-by: Linus Torvalds

x86/platform/UV: Remove Obsolete GRU MMR address translation

2016-05-04T06:48:51Z

Use no-op messages in place of cross-partition interrupts when nacking a put message in the GRU. This allows us to remove MMR's as a destination from the GRU driver. Tested-by: John Estabrook Tested-by: Gary Kroening Tested-by: Nathan Zimmer Signed-off-by: Dimitri Sivanich Signed-off-by: Mike Travis Cc: Andrew Banman Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Len Brown Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Russ Anderson Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20160429215406.012228480@asylum.americas.sgi.com Signed-off-by: Ingo Molnar

mm/gup: Switch all callers of get_user_pages() to not pass tsk/mm

2016-02-16T09:11:12Z

We will soon modify the vanilla get_user_pages() so it can no longer be used on mm/tasks other than 'current/current->mm', which is by far the most common way it is called. For now, we allow the old-style calls, but warn when they are used. (implemented in previous patch) This patch switches all callers of: get_user_pages() get_user_pages_unlocked() get_user_pages_locked() to stop passing tsk/mm so they will no longer see the warnings. Signed-off-by: Dave Hansen Reviewed-by: Thomas Gleixner Cc: Andrea Arcangeli Cc: Andrew Morton Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Kirill A. Shutemov Cc: Linus Torvalds Cc: Naoya Horiguchi Cc: Peter Zijlstra Cc: Rik van Riel Cc: Srikar Dronamraju Cc: Vlastimil Babka Cc: jack@suse.cz Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210156.113E9407@viggo.jf.intel.com Signed-off-by: Ingo Molnar

misc: sgi-gru: fix return of error

2015-10-04T11:55:59Z

If kzalloc() fails then gms is NULL and we are returning NULL, but the functions which called this function gru_register_mmu_notifier() are not expecting NULL as the return. They are expecting either a valid pointer or the error code in ERR_PTR. Signed-off-by: Sudip Mukherjee Acked-by: Dimitri Sivanich Signed-off-by: Greg Kroah-Hartman