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| author | Michal Hocko <mhocko@suse.com> | 2017-11-15 17:39:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-15 18:21:07 -0800 |
| commit | 0205f75571e3a70c35f0dd5e608773cce97d9dbb (patch) | |
| tree | 165da7db9ac71e5340d08f6534663e16886a2424 /mm/page_alloc.c | |
| parent | c50842c8e1cddcdb69d3ece4f4df005a0e6c5ceb (diff) | |
| download | lwn-0205f75571e3a70c35f0dd5e608773cce97d9dbb.tar.gz lwn-0205f75571e3a70c35f0dd5e608773cce97d9dbb.zip | |
mm: simplify nodemask printing
alloc_warn() and dump_header() have to explicitly handle NULL nodemask
which forces both paths to use pr_cont. We can do better. printk
already handles NULL pointers properly so all we need is to teach
nodemask_pr_args to handle NULL nodemask carefully. This allows
simplification of both alloc_warn() and dump_header() and gets rid of
pr_cont altogether.
This patch has been motivated by patch from Joe Perches
http://lkml.kernel.org/r/b31236dfe3fc924054fd7842bde678e71d193638.1509991345.git.joe@perches.com
[akpm@linux-foundation.org: fix tile warning, per Arnd]
Link: http://lkml.kernel.org/r/20171109100531.3cn2hcqnuj7mjaju@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8f2b9ad2e23f..7a199767dcee 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3279,20 +3279,14 @@ void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...) if ((gfp_mask & __GFP_NOWARN) || !__ratelimit(&nopage_rs)) return; - pr_warn("%s: ", current->comm); - va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; - pr_cont("%pV", &vaf); + pr_warn("%s: %pV, mode:%#x(%pGg), nodemask=%*pbl\n", + current->comm, &vaf, gfp_mask, &gfp_mask, + nodemask_pr_args(nodemask)); va_end(args); - pr_cont(", mode:%#x(%pGg), nodemask=", gfp_mask, &gfp_mask); - if (nodemask) - pr_cont("%*pbl\n", nodemask_pr_args(nodemask)); - else - pr_cont("(null)\n"); - cpuset_print_current_mems_allowed(); dump_stack(); |