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malloc: Correct the documentation of the top_pad default

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DEFAULT_TOP_PAD is defined as 131072 in
sysdeps/generic/malloc-machine.h.
This commit is contained in:
Florian Weimer 2022-08-04 10:24:47 +02:00
parent 3698f5a9dd
commit 6c93af6b45
3 changed files with 3 additions and 2 deletions
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1
elf/dl-tunables.list
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@ -42,6 +42,7 @@ glibc {
type: SIZE_T
env_alias: MALLOC_TOP_PAD_
security_level: SXID_IGNORE
default: 131072
}
perturb {
type: INT_32

2
elf/tst-rtld-list-tunables.exp
View File

@ -9,7 +9,7 @@ glibc.malloc.perturb: 0 (min: 0, max: 255)
glibc.malloc.tcache_count: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.tcache_max: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.tcache_unsorted_limit: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.top_pad: 0x0 (min: 0x0, max: 0x[f]+)
glibc.malloc.top_pad: 0x20000 (min: 0x0, max: 0x[f]+)
glibc.malloc.trim_threshold: 0x0 (min: 0x0, max: 0x[f]+)
glibc.rtld.dynamic_sort: 2 (min: 1, max: 2)
glibc.rtld.nns: 0x4 (min: 0x1, max: 0x10)

2
manual/tunables.texi
View File

@ -143,7 +143,7 @@ number of bytes to retain when shrinking any of the arenas. This provides the
necessary hysteresis in heap size such that excessive amounts of system calls
can be avoided.
The default value of this tunable is @samp{0}.
The default value of this tunable is @samp{131072} (128 KB).
@end deftp
@deftp Tunable glibc.malloc.perturb