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Message-ID: <20101021140615.GA31376@dumpdata.com>
Date: Thu, 21 Oct 2010 10:06:15 -0400
From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: [GIT PULL] stable/swiotlb-0.9 for v2.6.37
Hey Linus,
Please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb-2.6.git stable/swiotlb-0.9
which contains two patches since git commit cb655d0f3d57c23db51b981648e452988c0223f9
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date: Wed Oct 6 13:39:52 2010 -0700
Linux 2.6.36-rc7
There are two patches there for the lib/swiotlb.c library.
First is to cleanup the swiotlb.c library a bit and in the long-term remove the
dependency on the overflow buffer. The other is to page-align the early
buffer allocation so that if we don't use SWIOTLB we can de-allocate
the buffers and save two pages.
Thank you,
Konrad
The shortlog and diffstat:
FUJITA Tomonori (1):
swiotlb: make io_tlb_overflow static
Yinghai Lu (1):
swiotlb: Use page alignment for early buffer allocation
lib/swiotlb.c | 18 +++++++++---------
1 files changed, 9 insertions(+), 9 deletions(-)
---------------------
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 34e3082..7c06ee5 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -70,7 +70,7 @@ static unsigned long io_tlb_nslabs;
*/
static unsigned long io_tlb_overflow = 32*1024;
-void *io_tlb_overflow_buffer;
+static void *io_tlb_overflow_buffer;
/*
* This is a free list describing the number of free entries available from
@@ -147,16 +147,16 @@ void __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
* to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
* between io_tlb_start and io_tlb_end.
*/
- io_tlb_list = alloc_bootmem(io_tlb_nslabs * sizeof(int));
+ io_tlb_list = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
for (i = 0; i < io_tlb_nslabs; i++)
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_index = 0;
- io_tlb_orig_addr = alloc_bootmem(io_tlb_nslabs * sizeof(phys_addr_t));
+ io_tlb_orig_addr = alloc_bootmem_pages(PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
/*
* Get the overflow emergency buffer
*/
- io_tlb_overflow_buffer = alloc_bootmem_low(io_tlb_overflow);
+ io_tlb_overflow_buffer = alloc_bootmem_low_pages(PAGE_ALIGN(io_tlb_overflow));
if (!io_tlb_overflow_buffer)
panic("Cannot allocate SWIOTLB overflow buffer!\n");
if (verbose)
@@ -182,7 +182,7 @@ swiotlb_init_with_default_size(size_t default_size, int verbose)
/*
* Get IO TLB memory from the low pages
*/
- io_tlb_start = alloc_bootmem_low_pages(bytes);
+ io_tlb_start = alloc_bootmem_low_pages(PAGE_ALIGN(bytes));
if (!io_tlb_start)
panic("Cannot allocate SWIOTLB buffer");
@@ -308,13 +308,13 @@ void __init swiotlb_free(void)
get_order(io_tlb_nslabs << IO_TLB_SHIFT));
} else {
free_bootmem_late(__pa(io_tlb_overflow_buffer),
- io_tlb_overflow);
+ PAGE_ALIGN(io_tlb_overflow));
free_bootmem_late(__pa(io_tlb_orig_addr),
- io_tlb_nslabs * sizeof(phys_addr_t));
+ PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)));
free_bootmem_late(__pa(io_tlb_list),
- io_tlb_nslabs * sizeof(int));
+ PAGE_ALIGN(io_tlb_nslabs * sizeof(int)));
free_bootmem_late(__pa(io_tlb_start),
- io_tlb_nslabs << IO_TLB_SHIFT);
+ PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
}
}
--
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