Re: [PATCH 0/2] file-posix: Cache next hole

2021-03-29 Thread Max Reitz
On 11.02.21 18:22, Max Reitz wrote: Hi, [...] (Speaking of “unless the WRITE permission is shared”: mirror_top is a bit broken in that it takes no permissions (but WRITE if necessary) and shares everything. That seems wrong. Patch 1 addresses that, so that patch 2 can actually do something

[PATCH 0/2] file-posix: Cache next hole

2021-02-11 Thread Max Reitz
Hi, On Launchpad, Alexandre has reported a performance problem with SEEK_HOLE on filesystems with much fragmentation: https://bugs.launchpad.net/qemu/+bug/1912224 This isn’t the first report we’ve received on SEEK_HOLE being slow, and we’ve already taken measures to address this issue. For ex