hugetlb_add_hstate() prints a warning if the hstate already exists. This
was originally done as part of kernel command line parsing. If
'hugepagesz=' was specified more than once, the warning
pr_warn("hugepagesz= specified twice, ignoring\n");
would be printed.
Some architectures want to enable all huge page sizes. They would call
hugetlb_add_hstate for all supported sizes. However, this was done after
command line processing and as a result hstates could have already been
created for some sizes. To make sure no warning were printed, there would
often be code like:
if (!size_to_hstate(size)
hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT)
The only time we want to print the warning is as the result of command
line processing. So, remove the warning from hugetlb_add_hstate and add
it to the single arch independent routine processing "hugepagesz=". After
this, calls to size_to_hstate() in arch specific code can be removed and
hugetlb_add_hstate can be called without worrying about warning messages.
[mike.kravetz@oracle.com: fix hugetlb initialization]
Link: http://lkml.kernel.org/r/4c36c6ce-3774-78fa-abc4-b7346bf24348@oracle.com
Link: http://lkml.kernel.org/r/20200428205614.246260-5-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Mina Almasry <almasrymina@google.com>
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390]
Acked-by: Will Deacon <will@kernel.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Longpeng <longpeng2@huawei.com>
Cc: Nitesh Narayan Lal <nitesh@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Link: http://lkml.kernel.org/r/20200417185049.275845-4-mike.kravetz@oracle.com
Link: http://lkml.kernel.org/r/20200428205614.246260-4-mike.kravetz@oracle.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
clear_flush(vma->vm_mm, addr, ptep, pgsize, ncontig);
}
-static void __init add_huge_page_size(unsigned long size)
-{
- if (size_to_hstate(size))
- return;
-
- hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT);
-}
-
static int __init hugetlbpage_init(void)
{
#ifdef CONFIG_ARM64_4K_PAGES
- add_huge_page_size(PUD_SIZE);
+ hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
#endif
- add_huge_page_size(CONT_PMD_SIZE);
- add_huge_page_size(PMD_SIZE);
- add_huge_page_size(CONT_PTE_SIZE);
+ hugetlb_add_hstate((CONT_PMD_SHIFT + PMD_SHIFT) - PAGE_SHIFT);
+ hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
+ hugetlb_add_hstate((CONT_PTE_SHIFT + PAGE_SHIFT) - PAGE_SHIFT);
return 0;
}
if (!arch_hugetlb_valid_size((unsigned long)size))
return -EINVAL;
- if (!size_to_hstate(size))
- hugetlb_add_hstate(shift - PAGE_SHIFT);
+ hugetlb_add_hstate(shift - PAGE_SHIFT);
return 0;
}
static __init int gigantic_pages_init(void)
{
/* With CONTIG_ALLOC, we can allocate gigantic pages at runtime */
- if (IS_ENABLED(CONFIG_64BIT) && !size_to_hstate(1UL << PUD_SHIFT))
+ if (IS_ENABLED(CONFIG_64BIT))
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
return 0;
}
}
#ifdef CONFIG_HUGETLB_PAGE
-static void __init add_huge_page_size(unsigned long size)
-{
- unsigned int order;
-
- if (size_to_hstate(size))
- return;
-
- order = ilog2(size) - PAGE_SHIFT;
- hugetlb_add_hstate(order);
-}
-
static int __init hugetlbpage_init(void)
{
- add_huge_page_size(1UL << HPAGE_64K_SHIFT);
- add_huge_page_size(1UL << HPAGE_SHIFT);
- add_huge_page_size(1UL << HPAGE_256MB_SHIFT);
- add_huge_page_size(1UL << HPAGE_2GB_SHIFT);
+ hugetlb_add_hstate(HPAGE_64K_SHIFT - PAGE_SHIFT);
+ hugetlb_add_hstate(HPAGE_SHIFT - PAGE_SHIFT);
+ hugetlb_add_hstate(HPAGE_256MB_SHIFT - PAGE_SHIFT);
+ hugetlb_add_hstate(HPAGE_2GB_SHIFT - PAGE_SHIFT);
return 0;
}
static __init int gigantic_pages_init(void)
{
/* With compaction or CMA we can allocate gigantic pages at runtime */
- if (boot_cpu_has(X86_FEATURE_GBPAGES) && !size_to_hstate(1UL << PUD_SHIFT))
+ if (boot_cpu_has(X86_FEATURE_GBPAGES))
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
return 0;
}
}
default_hstate_size = HPAGE_SIZE;
- if (!size_to_hstate(default_hstate_size))
- hugetlb_add_hstate(HUGETLB_PAGE_ORDER);
+ hugetlb_add_hstate(HUGETLB_PAGE_ORDER);
}
default_hstate_idx = hstate_index(size_to_hstate(default_hstate_size));
if (default_hstate_max_huge_pages) {
unsigned long i;
if (size_to_hstate(PAGE_SIZE << order)) {
- pr_warn("hugepagesz= specified twice, ignoring\n");
return;
}
BUG_ON(hugetlb_max_hstate >= HUGE_MAX_HSTATE);
return 0;
}
+ if (size_to_hstate(size)) {
+ pr_warn("HugeTLB: hugepagesz %s specified twice, ignoring\n", s);
+ return 0;
+ }
+
hugetlb_add_hstate(ilog2(size) - PAGE_SHIFT);
return 1;
}