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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-12-16 20:57:20 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-12-16 20:57:20 +1030 |
| commit | af2613e16f071c4f119d4c72275a29a3777c626c (patch) | |
| tree | 8813d2d2d964ed2928329f7329beb5363b37b8bb /ctdb/configure.ac | |
| parent | c488ba440ad33a89dc2b1d7b3e5146ee53150847 (diff) | |
| download | samba-af2613e16f071c4f119d4c72275a29a3777c626c.tar.gz samba-af2613e16f071c4f119d4c72275a29a3777c626c.tar.xz samba-af2613e16f071c4f119d4c72275a29a3777c626c.zip | |
ctdb: use mlockall, cautiously
We don't want ctdb stalling due to paging; this can be far worse than
scheduling delays. But if we simply do mlockall(MCL_FUTURE), it
increases the risk that mmap (ie. tdb open) or malloc will fail,
causing us to abort.
This patch is a compromise: we mlock all current pages (including
10k of future stack for expansion) and then relock when a client
asks us to open a TDB. We warn, but don't exit, if it fails.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 82f778e85440bc713d3f87c08ddc955d3cfce926)
Diffstat (limited to 'ctdb/configure.ac')
| -rw-r--r-- | ctdb/configure.ac | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ctdb/configure.ac b/ctdb/configure.ac index aaec420c086..d4098a6a5ac 100644 --- a/ctdb/configure.ac +++ b/ctdb/configure.ac @@ -71,6 +71,7 @@ m4_include(ib/config.m4) AC_CHECK_HEADERS(sched.h) AC_CHECK_FUNCS(sched_setscheduler) +AC_CHECK_FUNCS(mlockall) AC_CACHE_CHECK([for sin_len in sock],ctdb_cv_HAVE_SOCK_SIN_LEN,[ AC_TRY_COMPILE([#include <sys/types.h> |