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| author | Alexander Eberspächer <alex.eberspaecher@gmail.com> | 2012-05-02 11:33:06 +0200 |
|---|---|---|
| committer | Alexander Eberspächer <alex.eberspaecher@gmail.com> | 2012-05-02 11:33:06 +0200 |
| commit | 8218cbea2a2b706775c3c302ea1a4c361bd40bcc (patch) | |
| tree | 5dc7e73749e99f2114c75a114ee87ee9f6ba24b1 | |
| parent | 0e39699c8c5618a54ce45fcf825c149307f8dfc9 (diff) | |
| download | openblas-8218cbea2a2b706775c3c302ea1a4c361bd40bcc.tar.gz openblas-8218cbea2a2b706775c3c302ea1a4c361bd40bcc.tar.bz2 openblas-8218cbea2a2b706775c3c302ea1a4c361bd40bcc.zip | |
Add Xianyi's patch for segfaults on kernel 2.6.32 and add documentation
accordingly.
| -rw-r--r-- | GotoBLAS_03FAQ.txt | 8 | ||||
| -rw-r--r-- | segfaults.patch | 27 |
2 files changed, 35 insertions, 0 deletions
diff --git a/GotoBLAS_03FAQ.txt b/GotoBLAS_03FAQ.txt index b6033fe53..b45e6d095 100644 --- a/GotoBLAS_03FAQ.txt +++ b/GotoBLAS_03FAQ.txt @@ -90,6 +90,14 @@ number of threads will consume extra resource. I recommend you to specify minimum number of threads. +1.9 Q I have segfaults when I compile with USE_OPENMP=1. What's wrong? + + A This may be related to a bug in the Linux kernel 2.6.32. Try applying + the patch segaults.patch using + + git am segfaults.patch + + and see if the crashes persist. 2. Architecture Specific issue or Implementation diff --git a/segfaults.patch b/segfaults.patch new file mode 100644 index 000000000..9585fa04b --- /dev/null +++ b/segfaults.patch @@ -0,0 +1,27 @@ +From ac40907baa90a0acc78139762ffa3c6f09274236 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Alexander=20Ebersp=C3=A4cher?= <alex.eberspaecher@gmail.com> +Date: Wed, 2 May 2012 11:22:52 +0200 +Subject: [PATCH] Fix segfaults with kernel 2.6.32. This comes at the price of many compiler warnings. + +--- + common_linux.h | 4 ++-- + 1 files changed, 2 insertions(+), 2 deletions(-) + +diff --git a/common_linux.h b/common_linux.h +index b0381d9..40a94cb 100644 +--- a/common_linux.h ++++ b/common_linux.h +@@ -76,8 +76,8 @@ static inline int my_mbind(void *addr, unsigned long len, int mode, + #endif + #else + //Fixed randomly SEGFAULT when nodemask==NULL with above Linux 2.6.34 +-// unsigned long null_nodemask=0; +- return syscall(SYS_mbind, addr, len, mode, nodemask, maxnode, flags); ++ unsigned long null_nodemask=0; ++ return syscall(SYS_mbind, addr, len, mode, &nodemask, maxnode, flags); + #endif + } + +-- +1.7.1 + |