]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
uprobe: use FOLL_SPLIT_PMD instead of FOLL_SPLIT
authorSong Liu <songliubraving@fb.com>
Mon, 23 Sep 2019 22:38:27 +0000 (15:38 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 24 Sep 2019 22:54:11 +0000 (15:54 -0700)
commit5a52c9df62b422087d0c88fc79641028e4472a3b
tree272587750b08e79e0547d2569a77395145d12cf0
parentbfe7b00de6d1e25fee08484c4fbf1c1ed175be78
uprobe: use FOLL_SPLIT_PMD instead of FOLL_SPLIT

Use the newly added FOLL_SPLIT_PMD in uprobe.  This preserves the huge
page when the uprobe is enabled.  When the uprobe is disabled, newer
instances of the same application could still benefit from huge page.

For the next step, we will enable khugepaged to regroup the pmd, so that
existing instances of the application could also benefit from huge page
after the uprobe is disabled.

Link: http://lkml.kernel.org/r/20190815164525.1848545-5-songliubraving@fb.com
Signed-off-by: Song Liu <songliubraving@fb.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/events/uprobes.c