diff options
| author | dillon <dillon@FreeBSD.org> | 2001-02-28 04:30:27 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 2001-02-28 04:30:27 +0000 |
| commit | 951d4c0a1d4404d6967a9c500fcb199dd487ac78 (patch) | |
| tree | 90abddd674c9c3be0ab8f3c03e2cae9d4339f620 /sys/i386/linux | |
| parent | 86a16a841cc7398024e514bf7a6fb0c3a5e6ba3f (diff) | |
| download | FreeBSD-src-951d4c0a1d4404d6967a9c500fcb199dd487ac78.zip FreeBSD-src-951d4c0a1d4404d6967a9c500fcb199dd487ac78.tar.gz | |
Linux does not filesystem-sync file-backed writable mmap pages on
a regular basis. Adjust our linux emulation to conform. This will
cause more dirty pages to be left for the pagedaemon to deal with,
but our new low-memory handling code can deal with it. The linux
way appears to be a trend, and we may very well make MAP_NOSYNC the
default for FreeBSD as well (once we have reasonable sequential
write-behind heuristics for random faults).
(will be MFC'd prior to 4.3 freeze)
Suggested by: Andrew Gallatin
Diffstat (limited to 'sys/i386/linux')
| -rw-r--r-- | sys/i386/linux/linux_machdep.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/i386/linux/linux_machdep.c b/sys/i386/linux/linux_machdep.c index bb07a27..d1fd21d 100644 --- a/sys/i386/linux/linux_machdep.c +++ b/sys/i386/linux/linux_machdep.c @@ -326,6 +326,8 @@ linux_mmap(struct proc *p, struct linux_mmap_args *args) bsd_args.flags |= MAP_FIXED; if (linux_args.flags & LINUX_MAP_ANON) bsd_args.flags |= MAP_ANON; + else + bsd_args.flags |= MAP_NOSYNC; if (linux_args.flags & LINUX_MAP_GROWSDOWN) { bsd_args.flags |= MAP_STACK; |
