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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0336-mm-slub-Don-t-resize-the-location-tracking-cache-on-.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/debian/patches-rt/0336-mm-slub-Don-t-resize-the-location-tracking-cache-on-.patch b/debian/patches-rt/0336-mm-slub-Don-t-resize-the-location-tracking-cache-on-.patch new file mode 100644 index 000000000..eaf171957 --- /dev/null +++ b/debian/patches-rt/0336-mm-slub-Don-t-resize-the-location-tracking-cache-on-.patch @@ -0,0 +1,38 @@ +From 4da7dd5c5195e9f48a911e768ca8bd317f5c6b7f Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Fri, 26 Feb 2021 17:26:04 +0100 +Subject: [PATCH 336/347] mm: slub: Don't resize the location tracking cache on + PREEMPT_RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +The location tracking cache has a size of a page and is resized if its +current size is too small. +This allocation happens with disabled interrupts and can't happen on +PREEMPT_RT. +Should one page be too small, then we have to allocate more at the +beginning. The only downside is that less callers will be visible. + +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +(cherry picked from commit 87bd0bf324f4c5468ea3d1de0482589f491f3145) +Signed-off-by: Clark Williams <williams@redhat.com> +--- + mm/slub.c | 3 +++ + 1 file changed, 3 insertions(+) + +diff --git a/mm/slub.c b/mm/slub.c +index 497096152c39..6b9b894ba5bc 100644 +--- a/mm/slub.c ++++ b/mm/slub.c +@@ -4591,6 +4591,9 @@ static int alloc_loc_track(struct loc_track *t, unsigned long max, gfp_t flags) + struct location *l; + int order; + ++ if (IS_ENABLED(CONFIG_PREEMPT_RT) && flags == GFP_ATOMIC) ++ return 0; ++ + order = get_order(sizeof(struct location) * max); + + l = (void *)__get_free_pages(flags, order); +-- +2.36.1 + |