diff options
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/ChangeLog | 28 | ||||
| -rw-r--r-- | nptl/pthread_create.c | 13 |
2 files changed, 30 insertions, 11 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index 098ef3ba2d..3887969cb8 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,9 @@ +2009-08-24 Ulrich Drepper <drepper@redhat.com> + + * pthread_create.c (start_thread): Hint to the kernel that memory for + the stack can be reused. We do not mark all the memory. The part + still in use and some reserve are kept. + 2009-08-23 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/bits/posix_opt.h: Clean up namespace. @@ -1847,9 +1853,9 @@ * sysdeps/unix/sysv/linux/sh/bits/pthreadtypes.h: Include endian.h. Split __flags into __flags, __shared, __pad1 and __pad2. * sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S: Use private - futexes if they are available. + futexes if they are available. * sysdeps/unix/sysv/linux/sh/lowlevellock.S: Adjust so that change - in libc-lowlevellock.S allow using private futexes. + in libc-lowlevellock.S allow using private futexes. * sysdeps/unix/sysv/linux/sh/lowlevellock.h: Define FUTEX_PRIVATE_FLAG. Add additional parameter to lll_futex_wait, lll_futex_timed_wait and lll_futex_wake. Change lll_futex_wait @@ -1857,12 +1863,12 @@ lll_private_futex_timed_wait and lll_private_futex_wake. (lll_robust_mutex_unlock): Fix typo. * sysdeps/unix/sysv/linux/sh/pthread_barrier_wait.S: Use private - field in futex command setup. + field in futex command setup. * sysdeps/unix/sysv/linux/sh/pthread_cond_timedwait.S: Use COND_NWAITERS_SHIFT instead of COND_CLOCK_BITS. * sysdeps/unix/sysv/linux/sh/pthread_cond_wait.S: Likewise. * sysdeps/unix/sysv/linux/sh/pthread_once.S: Use private futexes - if they are available. Remove clear_once_control. + if they are available. Remove clear_once_control. * sysdeps/unix/sysv/linux/sh/pthread_rwlock_rdlock.S: Use private futexes if they are available. * sysdeps/unix/sysv/linux/sh/pthread_rwlock_timedrdlock.S: Likewise. @@ -1873,7 +1879,7 @@ Wake only when there are waiters. * sysdeps/unix/sysv/linux/sh/sem_wait.S: Add private futex support. Indicate that there are waiters. Remove unnecessary - extra cancellation test. + extra cancellation test. * sysdeps/unix/sysv/linux/sh/sem_timedwait.S: Likewise. Removed left-over duplication of __sem_wait_cleanup. @@ -2587,14 +2593,14 @@ * tst-cancel25.c: New file. 2006-09-05 Jakub Jelinek <jakub@redhat.com> - Ulrich Drepper <drepper@redhat.com> + Ulrich Drepper <drepper@redhat.com> * sysdeps/pthread/gai_misc.h (GAI_MISC_NOTIFY): Don't decrement counterp if it is already zero. * sysdeps/pthread/aio_misc.h (AIO_MISC_NOTIFY): Likewise.. 2006-03-04 Jakub Jelinek <jakub@redhat.com> - Roland McGrath <roland@redhat.com> + Roland McGrath <roland@redhat.com> * sysdeps/unix/sysv/linux/i386/lowlevellock.h (LLL_STUB_UNWIND_INFO_START, LLL_STUB_UNWIND_INFO_END, @@ -2608,7 +2614,7 @@ * sysdeps/unix/sysv/linux/i386/i486/lowlevelrobustlock.S: Likewise. 2006-03-03 Jakub Jelinek <jakub@redhat.com> - Roland McGrath <roland@redhat.com> + Roland McGrath <roland@redhat.com> * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (LLL_STUB_UNWIND_INFO_START, LLL_STUB_UNWIND_INFO_END, @@ -3181,7 +3187,7 @@ * sysdeps/pthread/pthread.h: Adjust mutex initializers. * sysdeps/unix/sysv/linux/i386/not-cancel.h: Define openat_not_cancel, - openat_not_cancel_3, openat64_not_cancel, and openat64_not_cancel_3. + openat_not_cancel_3, openat64_not_cancel, and openat64_not_cancel_3. 2006-02-08 Jakub Jelinek <jakub@redhat.com> @@ -3603,7 +3609,7 @@ * Makefile ($(test-modules)): Remove static pattern rule. 2005-10-14 Jakub Jelinek <jakub@redhat.com> - Ulrich Drepper <drepper@redhat.com> + Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/x86_64/pthread_once.S: Fix stack alignment in callback function. @@ -3621,7 +3627,7 @@ atomic_compare_and_exchange_bool_acq. 2005-10-01 Ulrich Drepper <drepper@redhat.com> - Jakub Jelinek <jakub@redhat.com> + Jakub Jelinek <jakub@redhat.com> * descr.h: Define SETXID_BIT and SETXID_BITMASK. Adjust CANCEL_RESTMASK. diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index c69397906f..89938b3fb8 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -377,6 +377,19 @@ start_thread (void *arg) } #endif + /* Mark the memory of the stack as usable to the kernel. We free + everything except for the space used for the TCB itself. */ + size_t pagesize_m1 = __getpagesize () - 1; +#ifdef _STACK_GROWS_DOWN + char *sp = CURRENT_STACK_FRAME; + size_t freesize = (sp - (char *) pd->stackblock) & ~pagesize_m1; +#else +# error "to do" +#endif + assert (freesize < pd->stackblock_size); + if (freesize > PTHREAD_STACK_MIN) + madvise (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED); + /* If the thread is detached free the TCB. */ if (IS_DETACHED (pd)) /* Free the TCB. */ |