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Diffstat (limited to 'devel/linuxthreads/files/README.FreeBSD')
| -rw-r--r-- | devel/linuxthreads/files/README.FreeBSD | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/devel/linuxthreads/files/README.FreeBSD b/devel/linuxthreads/files/README.FreeBSD index d59a697de9d1..7aacaa3b5190 100644 --- a/devel/linuxthreads/files/README.FreeBSD +++ b/devel/linuxthreads/files/README.FreeBSD @@ -138,3 +138,24 @@ set at 20 + 16 * MAXUSERS. as if the kernel was compiled without the _KPOSIX_PRIORITY_SCHEDULING option, but limited to the linuxthread library. +7) libraries using SIGUSR2 or SIGUSR1 will conflict with linuxthreads. + SIGUSR1 is hardcoded in the FreeBSD kernel (cf. RFLINUXTHPN flag + passed to rfork()), but the linuxthreads library can be changed to use + another signal instead of SIGUSR2 by defining LINUXTHREADS_ALT_RESTARTSIG + to the alternate signal number (e.g. 32). + +8) By default, the maximum thread stack size is 2 MB, and the maximum + number of threads is 1024. Layout of stacks are based on the + maximum thread stack size. This means that 2 GB of the address space + can be used by thread stacks, limiting what is left for other + purposes (text, data, bss, heap, mmap). To shrink the address range + used for thread stacks, the maximum thread stack size can be changed + by defining LINUXTHREADS_MAX_STACK_SIZE to a suitable value, e.g. + 1048576. The maximum number of threads can be changed by defining + LINUXTHREADS_MAX_THREADS to a suitable value, e.g. 2048. + The product of the maximum thread stack size and the maximum number + of threads should not exceed 2 GB. The maximum stack size must be + a power of 2. + +9) The complete FreeBSD source code matching the installed userland + must be installed in /usr/src before building linuxthreads. |