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| author | Russ Cox <rsc@swtch.com> | 2014-04-19 13:44:06 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@swtch.com> | 2014-04-19 13:44:06 -0400 |
| commit | 833216fef8b946895956737d205bcad7031bf06f (patch) | |
| tree | 7a02033554aec4ee487f446e6b9678b133673783 /src/cmd/acme | |
| parent | 1d2c3c3945a229f896640b615b84f3d9a78e8b5a (diff) | |
| download | plan9port-833216fef8b946895956737d205bcad7031bf06f.tar.gz plan9port-833216fef8b946895956737d205bcad7031bf06f.tar.bz2 plan9port-833216fef8b946895956737d205bcad7031bf06f.zip | |
acme: add comment for aligned writes
TBR=r
https://codereview.appspot.com/89510044
Diffstat (limited to 'src/cmd/acme')
| -rw-r--r-- | src/cmd/acme/exec.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/cmd/acme/exec.c b/src/cmd/acme/exec.c index 0ef66847..6f8bf3f6 100644 --- a/src/cmd/acme/exec.c +++ b/src/cmd/acme/exec.c @@ -662,6 +662,11 @@ putfile(File *f, int q0, int q1, Rune *namer, int nname) warning(nil, "can't create file %s: %r\n", name); goto Rescue1; } + // Use bio in order to force the writes to be large and + // block-aligned (bio's default is 8K). This is not strictly + // necessary; it works around some buggy underlying + // file systems that mishandle unaligned writes. + // https://codereview.appspot.com/89550043/ b = emalloc(sizeof *b); Binit(b, fd, OWRITE); r = fbufalloc(); |