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- removed man-pages-3.22-sched_setaffinity.patch because the problem it describes was fixed in the kernel. see #533811 for more info

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Peter Schiffer 2012-09-13 16:24:20 +02:00
parent 1eca3cb073
commit 135d6da589
2 changed files with 1 additions and 66 deletions
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64
man-pages-3.22-sched_setaffinity.patch
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@ -1,64 +0,0 @@
diff -up man-pages-3.22/man2/sched_setaffinity.2.orig man-pages-3.22/man2/sched_setaffinity.2
--- man-pages-3.22/man2/sched_setaffinity.2.orig 2009-07-25 08:53:26.000000000 +0200
+++ man-pages-3.22/man2/sched_setaffinity.2 2009-12-02 15:29:17.000000000 +0100
@@ -212,6 +212,60 @@ system call returns the size (in bytes)
.I cpumask_t
data type that is used internally by the kernel to
represent the CPU set bit mask.
+
+The \fBcpu_set_t\fR affinity mask size provided by glibc only allows for upto
+1024 CPUs. It is possible to build Linux kernels with greater than 1024
+CPUs. Any application using the statically sized \fBcpu_set_t\fR will fail
+with \fBEINVAL\fR on such kernels. It is thus recommended that applications
+avoid using the statically sized \fBcpu_set_t\fR type, and instead dynamically
+allocate a mask using the CPU_*_S macros described in the \fBCPU_SET(3)\fR man
+page. Since it is not possible to determine ahead of time what \fBNR_CPUS\fR
+value the kernel was built with, applications must be prepared to catch
+\fBEINVAL\fR, and retry the command with a larger dynamically allocated mask.
+The example that follows illustrates portable usage.
+
+.SH EXAMPLE
+.nf
+ #define _GNU_SOURCE
+
+ #include <sched.h>
+ #include <stdio.h>
+ #include <errno.h>
+
+ int main(void)
+ {
+ cpu_set_t *mask;
+ size_t size;
+ int i;
+ int nrcpus = 1024;
+
+realloc:
+ mask = CPU_ALLOC(nrcpus);
+ size = CPU_ALLOC_SIZE(nrcpus);
+ CPU_ZERO_S(size, mask);
+ if ( sched_getaffinity(0, size, mask) == -1 ) {
+ CPU_FREE(mask);
+ if (errno == EINVAL &&
+ nrcpus < (1024 << 8)) {
+ nrcpus = nrcpus << 2;
+ goto realloc;
+ }
+ perror("sched_getaffinity");
+ return -1;
+ }
+
+ for ( i = 0; i < nrcpus; i++ ) {
+ if ( CPU_ISSET_S(i, size, mask) ) {
+ printf("CPU %d is set\\n", (i+1));
+ }
+ }
+
+ CPU_FREE(mask);
+
+ return 0;
+ }
+.fi
+
.SH "SEE ALSO"
.BR clone (2),
.BR getcpu (2),

3
man-pages.spec
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@ -33,7 +33,6 @@ Patch20: man-pages-3.42-unimplemented.patch
Patch40: man-pages-2.46-nscd.patch
# resolves: #522761
Patch41: man-pages-3.22-nsswitch.conf.patch
Patch42: man-pages-3.22-sched_setaffinity.patch
# resolves: #532629
Patch43: man-pages-3.23-ld.so.patch
# resolves: #698149
@ -83,7 +82,6 @@ Documentation Project (LDP).
%patch40 -p1
%patch41 -p1
%patch42 -p1
%patch43 -p1
%patch44 -p1
%patch45 -p1
@ -175,6 +173,7 @@ cd ..
- improved explanation about calling listen or connect on the ip(7) man page (#787567)
- mention sssd in the nsswitch.conf(5) man page (#694860)
- added information about incorrect use of getdents(2) call to the man page (#809490)
- removed man-pages-3.22-sched_setaffinity.patch because the problem it describes was fixed in the kernel. see #533811 for more info
* Thu Jul 19 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 3.41-2
- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild