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| author | Frank Ch. Eigler <fche@elastic.org> | 2009-02-05 13:45:26 -0500 |
|---|---|---|
| committer | Frank Ch. Eigler <fche@elastic.org> | 2009-02-05 13:47:07 -0500 |
| commit | 482472c332a2a8a9df203bb6fb8f3f6ed87a9cf4 (patch) | |
| tree | 26d3fbaa3a0d9bc7d3b4b6964327d8c53e6d9c4d | |
| parent | 4b7b5c032203bec067abc74800cdd0a444395574 (diff) | |
| download | systemtap-steved-482472c332a2a8a9df203bb6fb8f3f6ed87a9cf4.tar.gz systemtap-steved-482472c332a2a8a9df203bb6fb8f3f6ed87a9cf4.tar.xz systemtap-steved-482472c332a2a8a9df203bb6fb8f3f6ed87a9cf4.zip | |
PR9740/9816? - workaround for kernel valloc bug
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | buildrun.cxx | 1 | ||||
| -rw-r--r-- | runtime/ChangeLog | 5 | ||||
| -rw-r--r-- | runtime/autoconf-vm-area.c | 9 | ||||
| -rw-r--r-- | runtime/transport/ChangeLog | 7 | ||||
| -rw-r--r-- | runtime/transport/transport.c | 9 |
6 files changed, 36 insertions, 0 deletions
@@ -1,3 +1,8 @@ +2009-02-05 Frank Ch. Eigler <fche@elastic.org> + + PR9740/9816? + * buildrun.cxx: Add STAPCONF_VM_AREA autoconf test. + 2009-02-04 Mark Wielaard <mjw@redhat.com> * NEWS: process().mark(), sys/sdt.h and dtrace compatibility script. diff --git a/buildrun.cxx b/buildrun.cxx index 6ce56a09..15ba3ae1 100644 --- a/buildrun.cxx +++ b/buildrun.cxx @@ -121,6 +121,7 @@ compile_pass (systemtap_session& s) o << module_cflags << " += $(call stap_check_build, $(SYSTEMTAP_RUNTIME)/autoconf-dpath-path.c, -DSTAPCONF_DPATH_PATH,)" << endl; o << module_cflags << " += $(call stap_check_build, $(SYSTEMTAP_RUNTIME)/autoconf-synchronize-sched.c, -DSTAPCONF_SYNCHRONIZE_SCHED,)" << endl; o << module_cflags << " += $(call stap_check_build, $(SYSTEMTAP_RUNTIME)/autoconf-task-uid.c, -DSTAPCONF_TASK_UID,)" << endl; + o << module_cflags << " += $(call stap_check_build, $(SYSTEMTAP_RUNTIME)/autoconf-vm-area.c, -DSTAPCONF_VM_AREA,)" << endl; #if 0 /* NB: For now, the performance hit of probe_kernel_read/write (vs. our diff --git a/runtime/ChangeLog b/runtime/ChangeLog index 1c8f33b4..81a78c4b 100644 --- a/runtime/ChangeLog +++ b/runtime/ChangeLog @@ -1,3 +1,8 @@ +2009-02-05 Frank Ch. Eigler <fche@elastic.org> + + PR 9740/9816? + * autoconf-vm-area.c: New test. + 2009-02-02 Mark Wielaard <mjw@redhat.com> * sdt.h: Add STAP_PROBE7, 8 and 9 variants. diff --git a/runtime/autoconf-vm-area.c b/runtime/autoconf-vm-area.c new file mode 100644 index 00000000..920d103d --- /dev/null +++ b/runtime/autoconf-vm-area.c @@ -0,0 +1,9 @@ +#include <linux/vmalloc.h> +#include <asm/page.h> + +void foo (void) +{ + void *dummy; + dummy = alloc_vm_area (PAGE_SIZE); + free_vm_area (dummy); +} diff --git a/runtime/transport/ChangeLog b/runtime/transport/ChangeLog index e8e2a047..02f9f119 100644 --- a/runtime/transport/ChangeLog +++ b/runtime/transport/ChangeLog @@ -1,3 +1,10 @@ +2009-02-05 Frank Ch. Eigler <fche@elastic.org> + + PR9740/9816? + * transport.c (_stp_handle_start): Run alloc/free_vm_area() dummy + calls as workaround for kernel valloc/vfree bug. Suggested by + Masami Hiramat <mhiramat@redhat.com>. + 2009-01-06 Frank Ch. Eigler <fche@elastic.org> PR9699. diff --git a/runtime/transport/transport.c b/runtime/transport/transport.c index a572ef9c..97fbf860 100644 --- a/runtime/transport/transport.c +++ b/runtime/transport/transport.c @@ -64,6 +64,15 @@ static struct workqueue_struct *_stp_wq; static void _stp_handle_start(struct _stp_msg_start *st) { dbug_trans(1, "stp_handle_start\n"); + +#ifdef STAPCONF_VM_AREA + { /* PR9740: workaround for kernel valloc bug. */ + void *dummy; + dummy = alloc_vm_area (PAGE_SIZE); + free_vm_area (dummy); + } +#endif + _stp_target = st->target; st->res = probe_start(); if (st->res >= 0) |