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- Newsgroups: comp.os.linux
- Subject: Re: Buffer corruption problems.
- Message-ID: <1992Aug14.013130.26395@ucunix.san.uc.edu>
- From: zuazaga@ucunix.san.uc.edu (Humberto Ortiz-Zuazaga)
- Date: Fri, 14 Aug 92 01:31:30 GMT
- References: <1992Aug13.163854.21617@midway.uchicago.edu>
- <BURLEY.92Aug13153840@geech.gnu.ai.mit.edu> <CORYWEST.92Aug13180939@rio-grande.rice.edu>
- Organization: University of Cincinnati
- Keywords: HD: read_intr:, errors
- Summary: HD-controller reset in BIG compiles
- Lines: 36
-
- In article <CORYWEST.92Aug13180939@rio-grande.rice.edu> corywest@rice.edu (Cory West) writes:
- >In article <BURLEY.92Aug13153840@geech.gnu.ai.mit.edu>
- >burley@geech.gnu.ai.mit.edu (Craig Burley) writes:
- >
- >> ...I believe there is a bug in Linux that has the following behavior:
- >>
- >> - causes Linux to "misread" one 1024KB chunk of data from a disk-based file
- >> so that what your app ends up with is some _other_ 1024KB chunk
- >> (apparently from the same file)
- >>
- >> - occurs only during very heavy disk access, such as megabytes accessed
- >> continually
- >>
- >> - is intermittent, but happens enough to reproduce fairly easily
- >[Etc...]
- >
- > - Under heavy and prolonged disk I/O (in this example, while compiling
- >gdb from scratch) there seem to be problems with the buffer cache. After
- >compiling for a while, gcc will choke with a TON of strange errors
- and die.
-
- I get a series of "HD: read_intr: status = 0x59", "HD: read_intr:
- error = 0x10" followed by an "HD-controller reset" on an odball
- Western Digital + Seagate IDE when doing big compiles ever since 0.96.
- The compilations proceed without error, however.
-
- > - The errors always include the same file (which is why I thought
- >perhaps that that particular file was living on a disk block that was going
- >belly up. I plan to rename that file to .deadblock and putting a new copy
-
- It may be the same file, if compiling the file excercises the bug (not
- reading it, compiling it). Check to see how much memory is used during
- the compile, or turn off optimization?
- --
- Humberto Ortiz-Zuazaga zuazaga@ucunix.san.uc.edu
- Dept. of Physiology & Biophysics University of Cincinnati
-