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| author | Cannon Matthews <[email protected]> | 2018-08-17 22:49:17 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-08-17 23:20:32 +0000 |
| commit | 330d6e489a0ab49136561d7f792b1d81bcdbb83c (patch) | |
| tree | 3e051312557b545b5b4483ae2f35589bc0271c27 /mm/sparse.c | |
| parent | mm, page_alloc: double zone's batchsize (diff) | |
| download | kernel-330d6e489a0ab49136561d7f792b1d81bcdbb83c.tar.gz kernel-330d6e489a0ab49136561d7f792b1d81bcdbb83c.zip | |
mm/hugetlb.c: don't zero 1GiB bootmem pages
When using 1GiB pages during early boot, use the new
memblock_virt_alloc_try_nid_raw() to allocate memory without zeroing it.
Zeroing out hundreds or thousands of GiB in a single core memset() call
is very slow, and can make early boot last upwards of 20-30 minutes on
multi TiB machines.
The memory does not need to be zero'd as the hugetlb pages are always
zero'd on page fault.
Tested: Booted with ~3800 1G pages, and it booted successfully in
roughly the same amount of time as with 0, as opposed to the 25+ minutes
it would take before.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Cannon Matthews <[email protected]>
Acked-by: Mike Kravetz <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Andres Lagar-Cavilla <[email protected]>
Cc: Peter Feiner <[email protected]>
Cc: David Matlack <[email protected]>
Cc: Greg Thelen <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'mm/sparse.c')
0 files changed, 0 insertions, 0 deletions