Revision 4ceb5db9757aaeadcf8fbbf97d76bd42aa4df0d6 authored by Linus Torvalds on 01 August 2005, 18:14:49 UTC, committed by Linus Torvalds on 01 August 2005, 18:14:49 UTC
There's no real guarantee that handle_mm_fault() will always be able to break a COW situation - if an update from another thread ends up modifying the page table some way, handle_mm_fault() may end up requiring us to re-try the operation. That's normally fine, but get_user_pages() ended up re-trying it as a read, and thus a write access could in theory end up losing the dirty bit or be done on a page that had not been properly COW'ed. This makes get_user_pages() always retry write accesses as write accesses by making "follow_page()" require that a writable follow has the dirty bit set. That simplifies the code and solves the race: if the COW break fails for some reason, we'll just loop around and try again. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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| File | Mode | Size |
|---|---|---|
| bluetooth | ||
| irda | ||
| sctp | ||
| tc_act | ||
| act_api.h | -rw-r--r-- | 3.2 KB |
| act_generic.h | -rw-r--r-- | 3.2 KB |
| addrconf.h | -rw-r--r-- | 6.5 KB |
| af_unix.h | -rw-r--r-- | 2.1 KB |
| ah.h | -rw-r--r-- | 793 bytes |
| arp.h | -rw-r--r-- | 1.0 KB |
| atmclip.h | -rw-r--r-- | 1.7 KB |
| ax25.h | -rw-r--r-- | 13.1 KB |
| checksum.h | -rw-r--r-- | 2.2 KB |
| compat.h | -rw-r--r-- | 1.2 KB |
| datalink.h | -rw-r--r-- | 461 bytes |
| dn.h | -rw-r--r-- | 7.5 KB |
| dn_dev.h | -rw-r--r-- | 7.0 KB |
| dn_fib.h | -rw-r--r-- | 5.5 KB |
| dn_neigh.h | -rw-r--r-- | 837 bytes |
| dn_nsp.h | -rw-r--r-- | 7.3 KB |
| dn_route.h | -rw-r--r-- | 4.2 KB |
| dsfield.h | -rw-r--r-- | 1.0 KB |
| dst.h | -rw-r--r-- | 5.9 KB |
| esp.h | -rw-r--r-- | 1.7 KB |
| flow.h | -rw-r--r-- | 1.8 KB |
| gen_stats.h | -rw-r--r-- | 1.5 KB |
| icmp.h | -rw-r--r-- | 1.7 KB |
| ieee80211.h | -rw-r--r-- | 24.1 KB |
| if_inet6.h | -rw-r--r-- | 6.3 KB |
| inet_common.h | -rw-r--r-- | 1.4 KB |
| inet_ecn.h | -rw-r--r-- | 2.4 KB |
| inetpeer.h | -rw-r--r-- | 1.7 KB |
| ip.h | -rw-r--r-- | 10.1 KB |
| ip6_checksum.h | -rw-r--r-- | 2.1 KB |
| ip6_fib.h | -rw-r--r-- | 4.0 KB |
| ip6_route.h | -rw-r--r-- | 3.9 KB |
| ip6_tunnel.h | -rw-r--r-- | 1.0 KB |
| ip_fib.h | -rw-r--r-- | 8.1 KB |
| ip_mp_alg.h | -rw-r--r-- | 2.5 KB |
| ip_vs.h | -rw-r--r-- | 29.7 KB |
| ipcomp.h | -rw-r--r-- | 159 bytes |
| ipconfig.h | -rw-r--r-- | 821 bytes |
| ipip.h | -rw-r--r-- | 1.3 KB |
| ipv6.h | -rw-r--r-- | 12.2 KB |
| ipx.h | -rw-r--r-- | 3.8 KB |
| iw_handler.h | -rw-r--r-- | 20.3 KB |
| lapb.h | -rw-r--r-- | 4.7 KB |
| llc.h | -rw-r--r-- | 2.8 KB |
| llc_c_ac.h | -rw-r--r-- | 10.1 KB |
| llc_c_ev.h | -rw-r--r-- | 11.6 KB |
| llc_c_st.h | -rw-r--r-- | 1.7 KB |
| llc_conn.h | -rw-r--r-- | 4.0 KB |
| llc_if.h | -rw-r--r-- | 3.1 KB |
| llc_pdu.h | -rw-r--r-- | 14.3 KB |
| llc_s_ac.h | -rw-r--r-- | 1.6 KB |
| llc_s_ev.h | -rw-r--r-- | 2.3 KB |
| llc_s_st.h | -rw-r--r-- | 941 bytes |
| llc_sap.h | -rw-r--r-- | 1.0 KB |
| ndisc.h | -rw-r--r-- | 2.8 KB |
| neighbour.h | -rw-r--r-- | 10.0 KB |
| netrom.h | -rw-r--r-- | 7.3 KB |
| p8022.h | -rw-r--r-- | 292 bytes |
| pkt_act.h | -rw-r--r-- | 5.2 KB |
| pkt_cls.h | -rw-r--r-- | 9.1 KB |
| pkt_sched.h | -rw-r--r-- | 6.5 KB |
| protocol.h | -rw-r--r-- | 3.2 KB |
| psnap.h | -rw-r--r-- | 267 bytes |
| raw.h | -rw-r--r-- | 1.3 KB |
| rawv6.h | -rw-r--r-- | 644 bytes |
| request_sock.h | -rw-r--r-- | 6.4 KB |
| rose.h | -rw-r--r-- | 7.7 KB |
| route.h | -rw-r--r-- | 5.3 KB |
| sch_generic.h | -rw-r--r-- | 7.4 KB |
| scm.h | -rw-r--r-- | 1.7 KB |
| slhc_vj.h | -rw-r--r-- | 6.6 KB |
| snmp.h | -rw-r--r-- | 4.0 KB |
| sock.h | -rw-r--r-- | 36.8 KB |
| syncppp.h | -rw-r--r-- | 3.5 KB |
| tcp.h | -rw-r--r-- | 50.9 KB |
| tcp_ecn.h | -rw-r--r-- | 3.2 KB |
| transp_v6.h | -rw-r--r-- | 1.1 KB |
| udp.h | -rw-r--r-- | 2.7 KB |
| x25.h | -rw-r--r-- | 8.3 KB |
| x25device.h | -rw-r--r-- | 338 bytes |
| xfrm.h | -rw-r--r-- | 25.3 KB |
Computing file changes ...
