| Message ID | 20241013201704.49576-1-Julia.Lawall@inria.fr (mailing list archive) |
|---|---|
| Headers | show |
| Series | replace call_rcu by kfree_rcu for simple kmem_cache_free callback | expand |
On Sun, 13 Oct 2024 22:16:47 +0200, Julia Lawall wrote: > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. > > The changes were done using the following Coccinelle semantic patch. > This semantic patch is designed to ignore cases where the callback > function is used in another way. > > [...] Applied, thanks! [09/17] block: replace call_rcu by kfree_rcu for simple kmem_cache_free callback commit: 7a9b197adbafa9d6d1a79a0633607b78b1adef82 Best regards,
On Sun, Oct 13, 2024 at 10:16:47PM +0200, Julia Lawall wrote: > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. > > The changes were done using the following Coccinelle semantic patch. > This semantic patch is designed to ignore cases where the callback > function is used in another way. For the series: Acked-by: Paul E. McKenney <paulmck@kernel.org> > // <smpl> > #spatch --all-includes --include-headers > > @r@ > expression e; > local idexpression e2; > identifier cb,f,g; > position p; > @@ > > ( > call_rcu(...,e2) > | > call_rcu(&e->f,cb@p) > | > call_rcu(&e->f.g,cb@p) > ) > > @r1@ > type T,T1; > identifier x,r.cb; > @@ > > cb(...) { > ( > kmem_cache_free(...); > | > T x = ...; > kmem_cache_free(...,(T1)x); > | > T x; > x = ...; > kmem_cache_free(...,(T1)x); > ) > } > > @s depends on r1@ > position p != r.p; > identifier r.cb; > @@ > > cb@p > > @script:ocaml@ > cb << r.cb; > p << s.p; > @@ > > Printf.eprintf "Other use of %s at %s:%d\n" cb (List.hd p).file (List.hd p).line > > @depends on r1 && !s@ > expression e; > identifier r.cb,f,g; > position r.p; > @@ > > ( > - call_rcu(&e->f,cb@p) > + kfree_rcu(e,f) > | > - call_rcu(&e->f.g,cb@p) > + kfree_rcu(e,f.g) > ) > > @r1a depends on !s@ > type T,T1; > identifier x,r.cb; > @@ > > - cb(...) { > ( > - kmem_cache_free(...); > | > - T x = ...; > - kmem_cache_free(...,(T1)x); > | > - T x; > - x = ...; > - kmem_cache_free(...,(T1)x); > ) > - } > > @r2 depends on !r1@ > identifier r.cb; > @@ > > cb(...) { > ... > } > > @script:ocaml depends on !r1 && !r2@ > cb << r.cb; > @@ > > Printf.eprintf "need definition for %s\n" cb > // </smpl> > > --- > > arch/powerpc/kvm/book3s_mmu_hpte.c | 8 ------ > block/blk-ioc.c | 9 ------ > drivers/net/wireguard/allowedips.c | 9 +----- > fs/ecryptfs/dentry.c | 8 ------ > fs/nfsd/nfs4state.c | 9 ------ > kernel/time/posix-timers.c | 9 ------ > net/batman-adv/translation-table.c | 47 ++---------------------------------- > net/bridge/br_fdb.c | 9 ------ > net/can/gw.c | 13 ++------- > net/ipv4/fib_trie.c | 8 ------ > net/ipv4/inetpeer.c | 9 +----- > net/ipv6/ip6_fib.c | 9 ------ > net/ipv6/xfrm6_tunnel.c | 8 ------ > net/kcm/kcmsock.c | 10 ------- > net/netfilter/nf_conncount.c | 10 ------- > net/netfilter/nf_conntrack_expect.c | 10 ------- > net/netfilter/xt_hashlimit.c | 9 ------ > 17 files changed, 23 insertions(+), 171 deletions(-)
On 10/13/24 22:16, Julia Lawall wrote: > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. > > The changes were done using the following Coccinelle semantic patch. > This semantic patch is designed to ignore cases where the callback > function is used in another way. Thanks, LGTM! For the series: Acked-by: Vlastimil Babka <vbabka@suse.cz>
On Sun, Oct 13, 2024 at 10:16:47PM +0200, Julia Lawall wrote: > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. Applied and squashed into single patch for netfilter these patches: [17/17] netfilter: xt_hashlimit: replace call_rcu by kfree_rcu for simple kmem_cache_free callback [16/17] netfilter: expect: replace call_rcu by kfree_rcu for simple kmem_cache_free callback [15/17] netfilter: nf_conncount: replace call_rcu by kfree_rcu for simple kmem_cache_free callback this update is now flying to net-next. Thanks
Hello: This series was applied to netdev/net-next.git (main) by Simon Wunderlich <sw@simonwunderlich.de>: On Sun, 13 Oct 2024 22:16:47 +0200 you wrote: > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. > > The changes were done using the following Coccinelle semantic patch. > This semantic patch is designed to ignore cases where the callback > function is used in another way. > > [...] Here is the summary with links: - [01/17] wireguard: allowedips: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [02/17] ipv4: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [03/17] inetpeer: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [04/17] ipv6: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [05/17] xfrm6_tunnel: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [06/17] batman-adv: replace call_rcu by kfree_rcu for simple kmem_cache_free callback https://git.kernel.org/netdev/net-next/c/356c81b6c494 - [08/17] net: bridge: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [10/17] can: gw: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [14/17] kcm: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [15/17] netfilter: nf_conncount: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [16/17] netfilter: expect: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [17/17] netfilter: xt_hashlimit: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) You are awesome, thank you!
Hello: This series was applied to netdev/net-next.git (main) by Jakub Kicinski <kuba@kernel.org>: On Sun, 13 Oct 2024 22:16:47 +0200 you wrote: > Since SLOB was removed and since > commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), > it is not necessary to use call_rcu when the callback only performs > kmem_cache_free. Use kfree_rcu() directly. > > The changes were done using the following Coccinelle semantic patch. > This semantic patch is designed to ignore cases where the callback > function is used in another way. > > [...] Here is the summary with links: - [01/17] wireguard: allowedips: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [02/17] ipv4: replace call_rcu by kfree_rcu for simple kmem_cache_free callback https://git.kernel.org/netdev/net-next/c/497e17d80759 - [03/17] inetpeer: replace call_rcu by kfree_rcu for simple kmem_cache_free callback https://git.kernel.org/netdev/net-next/c/bb5810d4236b - [04/17] ipv6: replace call_rcu by kfree_rcu for simple kmem_cache_free callback https://git.kernel.org/netdev/net-next/c/85e48bcf294c - [05/17] xfrm6_tunnel: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [06/17] batman-adv: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [08/17] net: bridge: replace call_rcu by kfree_rcu for simple kmem_cache_free callback https://git.kernel.org/netdev/net-next/c/4ac64e570c33 - [10/17] can: gw: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [14/17] kcm: replace call_rcu by kfree_rcu for simple kmem_cache_free callback https://git.kernel.org/netdev/net-next/c/7bb3ecbc2b6b - [15/17] netfilter: nf_conncount: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [16/17] netfilter: expect: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) - [17/17] netfilter: xt_hashlimit: replace call_rcu by kfree_rcu for simple kmem_cache_free callback (no matching commit) You are awesome, thank you!
Since SLOB was removed and since commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"), it is not necessary to use call_rcu when the callback only performs kmem_cache_free. Use kfree_rcu() directly. The changes were done using the following Coccinelle semantic patch. This semantic patch is designed to ignore cases where the callback function is used in another way. // <smpl> #spatch --all-includes --include-headers @r@ expression e; local idexpression e2; identifier cb,f,g; position p; @@ ( call_rcu(...,e2) | call_rcu(&e->f,cb@p) | call_rcu(&e->f.g,cb@p) ) @r1@ type T,T1; identifier x,r.cb; @@ cb(...) { ( kmem_cache_free(...); | T x = ...; kmem_cache_free(...,(T1)x); | T x; x = ...; kmem_cache_free(...,(T1)x); ) } @s depends on r1@ position p != r.p; identifier r.cb; @@ cb@p @script:ocaml@ cb << r.cb; p << s.p; @@ Printf.eprintf "Other use of %s at %s:%d\n" cb (List.hd p).file (List.hd p).line @depends on r1 && !s@ expression e; identifier r.cb,f,g; position r.p; @@ ( - call_rcu(&e->f,cb@p) + kfree_rcu(e,f) | - call_rcu(&e->f.g,cb@p) + kfree_rcu(e,f.g) ) @r1a depends on !s@ type T,T1; identifier x,r.cb; @@ - cb(...) { ( - kmem_cache_free(...); | - T x = ...; - kmem_cache_free(...,(T1)x); | - T x; - x = ...; - kmem_cache_free(...,(T1)x); ) - } @r2 depends on !r1@ identifier r.cb; @@ cb(...) { ... } @script:ocaml depends on !r1 && !r2@ cb << r.cb; @@ Printf.eprintf "need definition for %s\n" cb // </smpl> --- arch/powerpc/kvm/book3s_mmu_hpte.c | 8 ------ block/blk-ioc.c | 9 ------ drivers/net/wireguard/allowedips.c | 9 +----- fs/ecryptfs/dentry.c | 8 ------ fs/nfsd/nfs4state.c | 9 ------ kernel/time/posix-timers.c | 9 ------ net/batman-adv/translation-table.c | 47 ++---------------------------------- net/bridge/br_fdb.c | 9 ------ net/can/gw.c | 13 ++------- net/ipv4/fib_trie.c | 8 ------ net/ipv4/inetpeer.c | 9 +----- net/ipv6/ip6_fib.c | 9 ------ net/ipv6/xfrm6_tunnel.c | 8 ------ net/kcm/kcmsock.c | 10 ------- net/netfilter/nf_conncount.c | 10 ------- net/netfilter/nf_conntrack_expect.c | 10 ------- net/netfilter/xt_hashlimit.c | 9 ------ 17 files changed, 23 insertions(+), 171 deletions(-)