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Diffstat (limited to 'Documentation/cachetlb.txt')
-rw-r--r-- | Documentation/cachetlb.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/cachetlb.txt b/Documentation/cachetlb.txt index 2b5f823abd03..9164ae3b83bc 100644 --- a/Documentation/cachetlb.txt +++ b/Documentation/cachetlb.txt | |||
@@ -5,7 +5,7 @@ | |||
5 | 5 | ||
6 | This document describes the cache/tlb flushing interfaces called | 6 | This document describes the cache/tlb flushing interfaces called |
7 | by the Linux VM subsystem. It enumerates over each interface, | 7 | by the Linux VM subsystem. It enumerates over each interface, |
8 | describes it's intended purpose, and what side effect is expected | 8 | describes its intended purpose, and what side effect is expected |
9 | after the interface is invoked. | 9 | after the interface is invoked. |
10 | 10 | ||
11 | The side effects described below are stated for a uniprocessor | 11 | The side effects described below are stated for a uniprocessor |
@@ -231,7 +231,7 @@ require a whole different set of interfaces to handle properly. | |||
231 | The biggest problem is that of virtual aliasing in the data cache | 231 | The biggest problem is that of virtual aliasing in the data cache |
232 | of a processor. | 232 | of a processor. |
233 | 233 | ||
234 | Is your port susceptible to virtual aliasing in it's D-cache? | 234 | Is your port susceptible to virtual aliasing in its D-cache? |
235 | Well, if your D-cache is virtually indexed, is larger in size than | 235 | Well, if your D-cache is virtually indexed, is larger in size than |
236 | PAGE_SIZE, and does not prevent multiple cache lines for the same | 236 | PAGE_SIZE, and does not prevent multiple cache lines for the same |
237 | physical address from existing at once, you have this problem. | 237 | physical address from existing at once, you have this problem. |
@@ -249,7 +249,7 @@ one way to solve this (in particular SPARC_FLAG_MMAPSHARED). | |||
249 | Next, you have to solve the D-cache aliasing issue for all | 249 | Next, you have to solve the D-cache aliasing issue for all |
250 | other cases. Please keep in mind that fact that, for a given page | 250 | other cases. Please keep in mind that fact that, for a given page |
251 | mapped into some user address space, there is always at least one more | 251 | mapped into some user address space, there is always at least one more |
252 | mapping, that of the kernel in it's linear mapping starting at | 252 | mapping, that of the kernel in its linear mapping starting at |
253 | PAGE_OFFSET. So immediately, once the first user maps a given | 253 | PAGE_OFFSET. So immediately, once the first user maps a given |
254 | physical page into its address space, by implication the D-cache | 254 | physical page into its address space, by implication the D-cache |
255 | aliasing problem has the potential to exist since the kernel already | 255 | aliasing problem has the potential to exist since the kernel already |