forked from pool/kdump
0a47303e13
- kdump-count-const-slabs.patch: Take constant-size slabs into account for "kdump calibrate" (bnc#879460). - kdump-count-framebuffer.patch: Take framebuffer size into account for "kdumptool calibrate" (bnc#879460). OBS-URL: https://build.opensuse.org/request/show/248055 OBS-URL: https://build.opensuse.org/package/show/Kernel:kdump/kdump?expand=0&rev=104
229 lines
6.0 KiB
Diff
229 lines
6.0 KiB
Diff
From: Petr Tesarik <ptesarik@suse.cz>
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Date: Mon Sep 8 09:28:04 2014 +0200
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Subject: Take framebuffer size into account for "kdumptool calibrate"
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References: bnc#879460
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Patch-mainline: v0.8.16
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Git-commit: 77ad2fff73fc6dd2dd0615e56967721ba9b96d83
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Git-commit: 7cd4e826671ded8fe36a4b4bdeef1223ce8397ca
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Depending on the resolution, framebuffer(s) may considerably influence
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kdump kernel requirements.
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Note that there is no framebuffer on z/Series, so after reading sysfs
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fails, the default size for s390(x) is zero.
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Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
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---
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kdumptool/calibrate.cc | 153 +++++++++++++++++++++++++++++++++++++++++++++++++
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kdumptool/fileutil.cc | 2
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kdumptool/fileutil.h | 2
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3 files changed, 155 insertions(+), 2 deletions(-)
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--- a/kdumptool/fileutil.cc
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+++ b/kdumptool/fileutil.cc
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@@ -295,7 +295,7 @@ FilePath FilePath::getCanonicalPath(cons
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}
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// -----------------------------------------------------------------------------
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-StringVector FilePath::listDir(const ListDirFilter &filter)
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+StringVector FilePath::listDir(const ListDirFilter &filter) const
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throw (KError)
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{
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StringVector v;
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--- a/kdumptool/fileutil.h
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+++ b/kdumptool/fileutil.h
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@@ -224,7 +224,7 @@ class FilePath : public KString {
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* list, @c false if all files should be included
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* @exception KError if something went wrong
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*/
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- StringVector listDir(const ListDirFilter &filter)
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+ StringVector listDir(const ListDirFilter &filter) const
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throw (KError);
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/**
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--- a/kdumptool/calibrate.cc
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+++ b/kdumptool/calibrate.cc
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@@ -19,7 +19,10 @@
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#include <iostream>
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#include <fstream>
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#include <cerrno>
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+#include <cstring>
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+#include <cstdlib>
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#include <unistd.h>
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+#include <dirent.h>
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#include "subcommand.h"
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#include "debug.h"
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@@ -173,6 +176,13 @@ static inline unsigned long s390x_align_
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// Estimated non-changing dynamic data (sysfs, procfs, etc.)
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#define KERNEL_DYNAMIC_KB MB(4)
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+// Default framebuffer size: 1024x768 @ 32bpp, except on mainframe
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+#if defined(__s390__) || defined(__s390x__)
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+# define DEF_FRAMEBUFFER_KB 0
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+#else
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+# define DEF_FRAMEBUFFER_KB (768UL*4)
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+#endif
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+
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// large hashes, default settings: -> per MiB
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// PID: sizeof(void*) for each 256 KiB 4
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// Dentry cache: sizeof(void*) for each 8 KiB 128
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@@ -303,6 +313,141 @@ unsigned long SystemCPU::count(const cha
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}
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//}}}
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+//{{{ Framebuffer --------------------------------------------------------------
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+
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+class Framebuffer {
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+
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+ public:
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+ /**
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+ * Initialize a new Framebuffer object.
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+ *
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+ * @param[in] fbpath Framebuffer sysfs directory path
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+ */
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+ Framebuffer(const char *fbpath)
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+ throw ()
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+ : m_dir(fbpath)
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+ {}
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+
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+ protected:
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+ /**
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+ * Path to the framebuffer device base directory
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+ */
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+ const FilePath m_dir;
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+
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+ public:
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+ /**
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+ * Get length of the framebuffer [in bytes].
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+ */
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+ unsigned long size(void) const;
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+};
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+
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+// -----------------------------------------------------------------------------
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+unsigned long Framebuffer::size(void) const
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+{
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+ FilePath fp;
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+ std::ifstream f;
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+ unsigned long width, height, stride;
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+ char sep;
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+
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+ fp.assign(m_dir);
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+ fp.appendPath("virtual_size");
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+ f.open(fp.c_str());
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+ if (!f)
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+ throw KError(fp + ": Open failed");
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+ f >> width >> sep >> height;
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+ f.close();
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+ if (f.bad())
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+ throw KError(fp + ": Read failed");
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+ else if (!f || sep != ',')
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+ throw KError(fp + ": Invalid content!");
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+ Debug::debug()->dbg("Framebuffer virtual size: %lux%lu", width, height);
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+
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+ fp.assign(m_dir);
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+ fp.appendPath("stride");
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+ f.open(fp.c_str());
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+ if (!f)
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+ throw KError(fp + ": Open failed");
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+ f >> stride;
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+ f.close();
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+ if (f.bad())
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+ throw KError(fp + ": Read failed");
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+ else if (!f || sep != ',')
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+ throw KError(fp + ": Invalid content!");
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+ Debug::debug()->dbg("Framebuffer stride: %lu bytes", stride);
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+
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+ return stride * height;
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+}
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+
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+//}}}
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+//{{{ Framebuffers -------------------------------------------------------------
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+
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+class Framebuffers {
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+
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+ public:
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+ /**
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+ * Initialize a new Framebuffer object.
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+ *
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+ * @param[in] sysdir Mount point for sysfs
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+ */
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+ Framebuffers(const char *sysdir = "/sys")
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+ throw ()
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+ : m_fbdir(FilePath(sysdir).appendPath("class/graphics"))
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+ {}
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+
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+ protected:
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+ /**
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+ * Path to the base directory with links to framebuffer devices
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+ */
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+ const FilePath m_fbdir;
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+
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+ /**
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+ * Filter only valid framebuffer device name
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+ */
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+ class DirFilter : public ListDirFilter {
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+
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+ public:
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+ virtual ~DirFilter()
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+ {}
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+
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+ bool test(const struct dirent *d) const
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+ {
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+ char *end;
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+ if (strncmp(d->d_name, "fb", 2))
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+ return false;
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+ strtoul(d->d_name + 2, &end, 10);
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+ return (*end == '\0' && end != d->d_name + 2);
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+ }
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+ };
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+
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+ public:
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+ /**
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+ * Get size of all framebuffers [in bytes].
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+ */
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+ unsigned long size(void) const;
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+};
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+
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+// -----------------------------------------------------------------------------
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+unsigned long Framebuffers::size(void) const
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+{
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+ Debug::debug()->trace("Framebuffers::size()");
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+
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+ unsigned long ret = 0UL;
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+
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+ StringVector v = m_fbdir.listDir(DirFilter());
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+ for (StringVector::const_iterator it = v.begin(); it != v.end(); ++it) {
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+ Debug::debug()->dbg("Found framebuffer: %s", it->c_str());
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+
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+ FilePath fp(m_fbdir);
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+ fp.appendPath(*it);
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+ Framebuffer fb(fp.c_str());
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+ ret += fb.size();
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+ }
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+
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+ Debug::debug()->dbg("Total size of all framebuffers: %lu bytes", ret);
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+ return ret;
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+}
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+
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+//}}}
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//{{{ Calibrate ----------------------------------------------------------------
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// -----------------------------------------------------------------------------
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@@ -345,6 +490,14 @@ void Calibrate::execute()
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// Run-time kernel requirements
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required = KERNEL_KB + ramfs + KERNEL_DYNAMIC_KB;
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+ try {
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+ Framebuffers fb;
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+ required += fb.size() / 1024UL;
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+ } catch(KError e) {
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+ Debug::debug()->dbg("Cannot get framebuffer size: %s", e.what());
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+ required += DEF_FRAMEBUFFER_KB;
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+ }
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+
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// Add memory based on CPU count
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unsigned long cpus;
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if (CAN_REDUCE_CPUS) {
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