[PATCH v2] makedumpfile: Add description of pages lost by ENOSPACE in IMPLEMENTATION

[Atsushi Kumagai]

>Currently, there is no obvious description in IMPLEMENTATION for
>distinguishing the lost pages resulted by ENOSPACE errors or others.
>So, it is added.

Thanks for re-posting, I'll merge this into v1.5.9.

Regards,
Atsushi Kumagai

>Signed-off-by: Zhou Wenjian <zhouwj-fnst at cn.fujitsu.com>
>---
> IMPLEMENTATION |    4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
>diff --git a/IMPLEMENTATION b/IMPLEMENTATION
>index 72df5d5..589c5bf 100644
>--- a/IMPLEMENTATION
>+++ b/IMPLEMENTATION
>@@ -240,6 +240,10 @@
>     The page header and page data are written in pairs. When writing page data
>     (pfn N+1), if ENOSPACE error happens, the page headers after N won't be
>     written either.
>+    Since the data lost is filled with zero when it is read, the page_desc->offset
>+    will also be zero. And zero page has its own offset not equal 0. So when reading
>+    page from incomplete core, only the page lost by ENOSPACE errors has 0 in its
>+    corresponding page descriptor's member offset.
>
>     If there is no page data dumped into the DUMPFILE, the DUMPFILE can't be
>     analysed by crash.
>--
>1.7.1
>
>
>_______________________________________________
>kexec mailing list
>kexec at lists.infradead.org
>http://lists.infradead.org/mailman/listinfo/kexec