diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-12-14 10:48:59 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-12-15 11:01:26 +0000 |
| commit | 4944566706b27918ca15eda913889db296792415 (patch) | |
| tree | 1e160c6b6ecaa5d209620e62a1a9f6a562de37aa /net/core/sock.c | |
| parent | e16064c9af7fe5a2220f7ad5f9be6fd7516e427c (diff) | |
net: increase optmem_max default value
For many years, /proc/sys/net/core/optmem_max default value
on a 64bit kernel has been 20 KB.
Regular usage of TCP tx zerocopy needs a bit more.
Google has used 128KB as the default value for 7 years without
any problem.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index fef349dd72fa..08ecdc68d2df 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -283,8 +283,10 @@ EXPORT_SYMBOL(sysctl_rmem_max); __u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX; __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX; -/* Maximal space eaten by iovec or ancillary data plus some space */ -int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512); +/* Limits per socket sk_omem_alloc usage. + * TCP zerocopy regular usage needs 128 KB. + */ +int sysctl_optmem_max __read_mostly = 128 * 1024; EXPORT_SYMBOL(sysctl_optmem_max); int sysctl_tstamp_allow_data __read_mostly = 1; |