New: ext4 & tmpfs: Splicing to regular files doesn't trigger inotify
https://bugzilla.kernel.org/show_bug.cgi?id=85381
Bug ID: 85381
Summary: ext4 & tmpfs: Splicing to regular files doesn't
trigger inotify
Product: File System
Version: 2.5
Kernel Version: 3.14
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
Assignee: [email protected]
Reporter: [email protected]
Regression: No
* How to reproduce:
/tmp % cat a.c
#define _GNU_SOURCE 1
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
int main(void)
{
int pipefd[2];
pipe(pipefd);
for (;;) {
sleep(1);
write(pipefd[1], "Hello world\n", 12);
splice(pipefd[0], NULL, 1, NULL, INT_MAX, 0);
}
}/tmp % gcc a.c
/tmp % touch a.txt
/tmp % ./a.out > a.txt & tail -f a.txt
* Expected result:
tail prints "Hello world" every second.
* Actual result:
btrfs: Works as expected;
ext4/tmpfs: tail blocks on inotify forever and prints nothing.
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[Bug 85381] ext4 & tmpfs: Splicing to regular files doesn't trigger inotify
https://bugzilla.kernel.org/show_bug.cgi?id=85381
Jan Kara <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |[email protected]
Resolution|--- |CODE_FIX--- Comment #1 from Jan Kara <[email protected]> ---
So this isn't a problem with current kernel (I tested 3.17-rc5) anymore. I believe it got fixed by Al Viro's splice rewrite so 3.16 and newer kernels should have the problem fixed.
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[Bug 85381] ext4 & tmpfs: Splicing to regular files doesn't trigger inotify
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=85381
Dario Andreani ([email protected]) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #2 from Dario Andreani ([email protected]) --- I still see this issue on kernel versions 4.4 and 4.9. But not on 4.15.
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