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| author | Jason Evans <jasone@canonware.com> | 2016-04-06 11:54:44 -0700 |
|---|---|---|
| committer | Jason Evans <jasone@canonware.com> | 2016-04-11 02:35:00 -0700 |
| commit | 245ae6036c09cc11a72fab4335495d95cddd5beb (patch) | |
| tree | 675007737fcc682ab3929c66f1a590e7ed144c23 /include/jemalloc/internal/bitmap.h | |
| parent | 96aa67aca89725f0b1df3257421a3d0a48eb2700 (diff) | |
| download | platform_external_jemalloc_new-245ae6036c09cc11a72fab4335495d95cddd5beb.tar.gz platform_external_jemalloc_new-245ae6036c09cc11a72fab4335495d95cddd5beb.tar.bz2 platform_external_jemalloc_new-245ae6036c09cc11a72fab4335495d95cddd5beb.zip | |
Support --with-lg-page values larger than actual page size.
During over-allocation in preparation for creating aligned mappings,
allocate one more page than necessary if PAGE is the actual page size,
so that trimming still succeeds even if the system returns a mapping
that has less than PAGE alignment. This allows compiling with e.g. 64
KiB "pages" on systems that actually use 4 KiB pages.
Note that for e.g. --with-lg-page=21, it is also necessary to increase
the chunk size (e.g. --with-malloc-conf=lg_chunk:22) so that there are
at least two "pages" per chunk. In practice this isn't a particularly
compelling configuration because so much (unusable) virtual memory is
dedicated to chunk headers.
Diffstat (limited to 'include/jemalloc/internal/bitmap.h')
| -rw-r--r-- | include/jemalloc/internal/bitmap.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/jemalloc/internal/bitmap.h b/include/jemalloc/internal/bitmap.h index 894695f4..36f38b59 100644 --- a/include/jemalloc/internal/bitmap.h +++ b/include/jemalloc/internal/bitmap.h @@ -17,8 +17,8 @@ typedef unsigned long bitmap_t; /* * Do some analysis on how big the bitmap is before we use a tree. For a brute - * force linear search, if we would have to call ffsl more than 2^3 times, use a - * tree instead. + * force linear search, if we would have to call ffs_lu() more than 2^3 times, + * use a tree instead. */ #if LG_BITMAP_MAXBITS - LG_BITMAP_GROUP_NBITS > 3 # define USE_TREE |