| Message ID | 20200506162217.16633-1-longman@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] doc: Fix some errors in ras.rst | expand |
On Wed, May 06, 2020 at 12:22:17PM -0400, Waiman Long wrote: > Make some miscellaneous fixes to the first paragraph of "ECC memory": > - Change the incorrect "74 bits" to "72 bits". > - Change "mentioned on" to "mentioned in". > - Remove the extra "extra". > - Rephrase some sentences as suggested by Matthew Wilcox. > > Signed-off-by: Waiman Long <longman@redhat.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
On Wed, 6 May 2020 09:37:15 -0700 Matthew Wilcox <willy@infradead.org> wrote: > On Wed, May 06, 2020 at 12:22:17PM -0400, Waiman Long wrote: > > Make some miscellaneous fixes to the first paragraph of "ECC memory": > > - Change the incorrect "74 bits" to "72 bits". > > - Change "mentioned on" to "mentioned in". > > - Remove the extra "extra". > > - Rephrase some sentences as suggested by Matthew Wilcox. > > > > Signed-off-by: Waiman Long <longman@redhat.com> > > Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> > Applied, thanks. jon
diff --git a/Documentation/admin-guide/ras.rst b/Documentation/admin-guide/ras.rst index 0310db624964..e48f6bcf305b 100644 --- a/Documentation/admin-guide/ras.rst +++ b/Documentation/admin-guide/ras.rst @@ -156,11 +156,11 @@ the labels provided by the BIOS won't match the real ones. ECC memory ---------- -As mentioned on the previous section, ECC memory has extra bits to be -used for error correction. So, on 64 bit systems, a memory module -has 64 bits of *data width*, and 74 bits of *total width*. So, there are -8 bits extra bits to be used for the error detection and correction -mechanisms. Those extra bits are called *syndrome*\ [#f1]_\ [#f2]_. +As mentioned in the previous section, ECC memory has extra bits to be +used for error correction. In the above example, a memory module has +64 bits of *data width*, and 72 bits of *total width*. The extra 8 +bits which are used for the error detection and correction mechanisms +are referred to as the *syndrome*\ [#f1]_\ [#f2]_. So, when the cpu requests the memory controller to write a word with *data width*, the memory controller calculates the *syndrome* in real time,
Make some miscellaneous fixes to the first paragraph of "ECC memory": - Change the incorrect "74 bits" to "72 bits". - Change "mentioned on" to "mentioned in". - Remove the extra "extra". - Rephrase some sentences as suggested by Matthew Wilcox. Signed-off-by: Waiman Long <longman@redhat.com> --- Documentation/admin-guide/ras.rst | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)