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filejournal: journal write cache is safe on >= 2.6.33

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This commit is contained in:
Sage Weil 2010-06-17 09:29:12 -07:00
parent 583f9f4296
commit f976bbdcf7
1 changed files with 4 additions and 2 deletions
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6
src/os/FileJournal.cc
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@ -105,11 +105,13 @@ int FileJournal::_open(bool forwrite, bool create)
int on;
if (sscanf(s, " write-caching = %d", &on) == 1) {
if (on) {
dout(0) << "WARNING: disk write cache is ON, journaling will not be reliable" << dendl;
dout(0) << "WARNING: disk write cache is ON; journaling will not be reliable" << dendl;
dout(0) << " on kernels prior to 2.6.33 (recent kernels are safe)" << dendl;
dout(0) << " disable with 'hdparm -W 0 " << fn << "'" << dendl;
cout << TEXT_RED
<< " ** WARNING: disk write cache is ON on " << fn << ".\n"
<< " Journaling will not be reliable. Disable write cache with\n"
<< " Journaling will not be reliable on kernels prior to 2.6.33\n"
<< " (recent kernels are safe). You can disable the write cache with\n"
<< " 'hdparm -W 0 " << fn << "'"
<< TEXT_NORMAL
<< std::endl;