Messages in this thread | | | Date | Sat, 9 Dec 2000 13:43:27 +0100 | From | Rasmus Andersen <> | Subject | Re: [PATCH] mm->rss is modified without page_table_lock held |
| |
On Sat, Dec 09, 2000 at 11:25:09AM +0100, Roberto Fichera wrote: [...] > >+ spin_lock(&mm->page_table_lock); > > mm->rss++; > >+ spin_unlock(&mm->page_table_lock); > > > > [...snip...] > > Why we couldn't use atomic_inc(&mm->rss) here and below, avoiding to wrap > the inc with a spin_lock()/spin_unlock() ? >
AFAIR, because for some architectures we can't rely on mm->rss fitting in an atomic_t. See davem's (somewhat short) post in this thread. Otherwise search the archives for the original thread treating this problem. -- Rasmus(rasmus@jaquet.dk)
Television is called a medium because it is neither rare nor well-done. -- Anonymous - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
| |