Revision 9aea5a65aa7a1af9a4236dfaeb0088f1624f9919 authored by Roland McGrath on 08 September 2010, 02:37:06 UTC, committed by Linus Torvalds on 10 September 2010, 15:10:26 UTC
An execve with a very large total of argument/environment strings can take a really long time in the execve system call. It runs uninterruptibly to count and copy all the strings. This change makes it abort the exec quickly if sent a SIGKILL. Note that this is the conservative change, to interrupt only for SIGKILL, by using fatal_signal_pending(). It would be perfectly correct semantics to let any signal interrupt the string-copying in execve, i.e. use signal_pending() instead of fatal_signal_pending(). We'll save that change for later, since it could have user-visible consequences, such as having a timer set too quickly make it so that an execve can never complete, though it always happened to work before. Signed-off-by: Roland McGrath <roland@redhat.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 9.8 KB |
| Kconfig.debug | -rw-r--r-- | 1014 bytes |
| Makefile | -rw-r--r-- | 1.6 KB |
| backing-dev.c | -rw-r--r-- | 18.8 KB |
| bootmem.c | -rw-r--r-- | 24.1 KB |
| bounce.c | -rw-r--r-- | 6.5 KB |
| compaction.c | -rw-r--r-- | 16.2 KB |
| debug-pagealloc.c | -rw-r--r-- | 2.5 KB |
| dmapool.c | -rw-r--r-- | 12.9 KB |
| fadvise.c | -rw-r--r-- | 3.5 KB |
| failslab.c | -rw-r--r-- | 1.6 KB |
| filemap.c | -rw-r--r-- | 66.2 KB |
| filemap_xip.c | -rw-r--r-- | 11.0 KB |
| fremap.c | -rw-r--r-- | 6.7 KB |
| highmem.c | -rw-r--r-- | 11.5 KB |
| hugetlb.c | -rw-r--r-- | 74.8 KB |
| hwpoison-inject.c | -rw-r--r-- | 3.3 KB |
| init-mm.c | -rw-r--r-- | 647 bytes |
| internal.h | -rw-r--r-- | 7.1 KB |
| kmemcheck.c | -rw-r--r-- | 2.8 KB |
| kmemleak-test.c | -rw-r--r-- | 3.3 KB |
| kmemleak.c | -rw-r--r-- | 49.6 KB |
| ksm.c | -rw-r--r-- | 52.4 KB |
| maccess.c | -rw-r--r-- | 1.6 KB |
| madvise.c | -rw-r--r-- | 11.3 KB |
| memblock.c | -rw-r--r-- | 12.5 KB |
| memcontrol.c | -rw-r--r-- | 120.2 KB |
| memory-failure.c | -rw-r--r-- | 36.2 KB |
| memory.c | -rw-r--r-- | 96.9 KB |
| memory_hotplug.c | -rw-r--r-- | 22.1 KB |
| mempolicy.c | -rw-r--r-- | 67.2 KB |
| mempool.c | -rw-r--r-- | 8.9 KB |
| migrate.c | -rw-r--r-- | 26.7 KB |
| mincore.c | -rw-r--r-- | 7.6 KB |
| mlock.c | -rw-r--r-- | 15.5 KB |
| mm_init.c | -rw-r--r-- | 3.7 KB |
| mmap.c | -rw-r--r-- | 69.3 KB |
| mmu_context.c | -rw-r--r-- | 1.4 KB |
| mmu_notifier.c | -rw-r--r-- | 8.8 KB |
| mmzone.c | -rw-r--r-- | 2.5 KB |
| mprotect.c | -rw-r--r-- | 7.6 KB |
| mremap.c | -rw-r--r-- | 13.0 KB |
| msync.c | -rw-r--r-- | 2.4 KB |
| nommu.c | -rw-r--r-- | 48.3 KB |
| oom_kill.c | -rw-r--r-- | 19.9 KB |
| page-writeback.c | -rw-r--r-- | 38.8 KB |
| page_alloc.c | -rw-r--r-- | 150.8 KB |
| page_cgroup.c | -rw-r--r-- | 11.4 KB |
| page_io.c | -rw-r--r-- | 3.2 KB |
| page_isolation.c | -rw-r--r-- | 3.6 KB |
| pagewalk.c | -rw-r--r-- | 4.7 KB |
| percpu-km.c | -rw-r--r-- | 2.7 KB |
| percpu-vm.c | -rw-r--r-- | 13.0 KB |
| percpu.c | -rw-r--r-- | 53.7 KB |
| percpu_up.c | -rw-r--r-- | 711 bytes |
| prio_tree.c | -rw-r--r-- | 6.3 KB |
| quicklist.c | -rw-r--r-- | 2.4 KB |
| readahead.c | -rw-r--r-- | 15.4 KB |
| rmap.c | -rw-r--r-- | 45.5 KB |
| shmem.c | -rw-r--r-- | 71.6 KB |
| slab.c | -rw-r--r-- | 118.3 KB |
| slob.c | -rw-r--r-- | 17.2 KB |
| slub.c | -rw-r--r-- | 109.3 KB |
| sparse-vmemmap.c | -rw-r--r-- | 6.2 KB |
| sparse.c | -rw-r--r-- | 20.5 KB |
| swap.c | -rw-r--r-- | 12.9 KB |
| swap_state.c | -rw-r--r-- | 10.4 KB |
| swapfile.c | -rw-r--r-- | 64.3 KB |
| thrash.c | -rw-r--r-- | 1.9 KB |
| truncate.c | -rw-r--r-- | 16.4 KB |
| util.c | -rw-r--r-- | 7.0 KB |
| vmalloc.c | -rw-r--r-- | 60.9 KB |
| vmscan.c | -rw-r--r-- | 81.7 KB |
| vmstat.c | -rw-r--r-- | 28.9 KB |
Computing file changes ...
